Malicious PDF — malware analysis report

Static analysis result for SHA-256 561bb63ac2224600…

MALICIOUS

PDF

89.2 KB Created: 2021-09-20 21:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 12b9ff06b3bdb4a55c71b069814ce70b SHA-1: ef75a583f41d66dcf0fe829e099cc47edb3a7ab6 SHA-256: 561bb63ac2224600846fe4a5c413b7a4356dfdc8b93500ca3e1b53140c2a7aea
236 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier. It employs social engineering tactics, specifically a 'ClickFix' lure, by instructing the user to copy and paste content into a terminal to execute commands. This suggests an attempt to bypass macro restrictions and directly execute malicious code. The document also contains numerous links to potentially compromised websites, indicating a possible phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • 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://manpukulivermore.com/uploads/files/nadikakuvobeburukolirez.pdf In PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/76962689438.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cde2113807---jukuwudovijuxakadekitob.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/benuxotefese.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/pikevunipajupelerotonivib.pdfIn PDF document text
    • https://profession-your-dr.com/uploads/files/202109090849205444.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/poxawefawuvaz.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613057a41255f---50110003512.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161467272af306---pepalavexuzuwitaful.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/dulisezijeboferon.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9ec2e2ef6---jovasupekoregowuxa.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/pifewubatikixugabop.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/60174469665.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c038bd4371---golikuj.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/ruvezele.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff81211901---zorojagoxalipuwu.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/darenexafufujuluf.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d891b9016b---37525527635.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents/files/50037691205.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/jidatidupi.pdfIn PDF document text
    • http://itcbeautytrainingschool.com/userfiles/file/tewiw.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/39946452805.pdfIn PDF document text
    • http://01host.ru/userfiles/files/75534045053.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/xebojitesuto.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/19383857014.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/jevupafuwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=gta+3+zip+file+download+for+androidPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF842 17980 bytes
SHA-256: c0a3457979380b41540f5a8757eb1bde964d450b05a63b3a7bc4da7cfddeb598
font_01_sfnt_off00012672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12672 10680 bytes
SHA-256: 7b4ee5aba313927115c93729f8209d5461dd75cea9da87452688f04e8133a2b5
font_02_sfnt_off00013f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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