Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a62dc5a76e74772…

MALICIOUS

PDF

109.5 KB Created: 2021-08-05 14:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e3621b95ec1ffbe932fc3bbdde0ceaf0 SHA-1: 55527ef2d6471ade4c561741a6efb938cc9d9d8e SHA-256: 0a62dc5a76e747726749acc7061b579663b207d4b8b8168494a24f256af3a17a
304 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

This PDF document exhibits multiple high-risk heuristics, including a ML classifier flagging it as malicious and ClamAV detection as 'Pdf.Phishing.Trojan'. The document instructs the user to disable security software and copy/paste content into a shell, indicating an attempt to bypass defenses and execute a payload. The presence of numerous external URIs, some pointing to compromised CMS uploads and disposable hosting, suggests a link farm designed to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 11

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://agcslohian.com/userfiles/file/36957459907.pdf In PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/10afccc1f3619bce3356c58aebbd91c9/xifovawizipujuwivoxesol.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/54f0a83e4be6dc4bd4822f10f0491341/19171470091.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/90003032744.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/99133221045.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/vomalebivibu.pdfIn PDF document text
    • http://petrduchek.com/files/64458060262.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/54134131472.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/74486325647.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160f219a6b4cc8---vatenoditaxubefibava.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe8f1dc4fd---didebudetoz.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/7dlqhtb9k3tq0gs4bmb21qofh3/jafimerenejuwepometiv.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da193f10428---26557546750.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841ce77a558---ramepalomikeropisu.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/7aa59bf6618931525ab857cae3c67895/80839306981.pdfIn PDF document text
    • http://sbairs.com/datas/files/jifanagenitejunopoveki.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/5rev5omt652mhrtir3janho1fq/buzub.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbac3d0990---rivugoguwuxap.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/15616461675.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/28378122181.pdfPDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f74dd6d8e9e---54600175289.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a527d67a9c6---gajakonefu.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/5150142228.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=minitool+partition+wizard+pro+ultimate+10.2+1+keygen+%2B+bootcdPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BB 11636 bytes
SHA-256: 85742ab6add58447f7a539a949dd5545bd555c72b9aa7e2f045ee0041f0b17da
font_01_sfnt_off0001412b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1412B 22440 bytes
SHA-256: 04b34ddbdada01bde417d72ccb832e20b344be60fe628e83fcc33ff915be9450
font_02_sfnt_off000178eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000190fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190FC 16376 bytes
SHA-256: 0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855

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