Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b446b0edc9f313a…

MALICIOUS

PDF

87.3 KB Created: 2021-08-08 10:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: f22df2f665d47926c8aaff6f8f81411e SHA-1: 949dc510a3d13b7760e58716a0898e82a5fbbacf SHA-256: 9b446b0edc9f313ae203b4822a6ea95b6cd568ff19833c11606dcdac5cdd592d
256 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics to trick users into executing malicious commands or installing unwanted software. Heuristics indicate lures for clipboard command execution and browser extension installation, suggesting an attempt to compromise the user's system or steal credentials. The document also contains numerous links to external URLs, many hosted on compromised CMS platforms, which likely serve as download sites for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 9

  • 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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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 https://drafthe.ru/uplcv?utm_term=how+to+stop+web+page+auto+refresh+in+chrome PDF link annotation
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/9212710392206666a6d95709fe715f75/49431496144.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/31516411967.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/9n7uq16qklvol9a9qbd8se3v4s/fologodozekalamiwejivube.pdfIn PDF document text
    • https://wita.lt/images/files/37372830957.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/619b4f23171c844b94ab224cd159eb21/71131613539.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48bbcebf30---gubexaserukazegaralanel.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/10eb6dc9c00c157c0833531a525ad75c/lurirumisuviwaxisepajeg.pdfIn PDF document text
    • http://asfalon.com/__files/file/86716140455.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/momisupaxotijonesum.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af84a17e2e8---84029869839.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/35968887019.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/19620519863.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/57939978234.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/65655254003.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160feac8314da9---zusowevojefuvikebamoxe.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/lavig.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210518211209.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/kixasa.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/f0c1be688ee2af98343ac08916b7f781/jamulejazinani.pdfIn PDF document text
    • http://cosmickino.ru/sadm_files/fumadujoluxapug.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/36232967219.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/09chn0fa7mnq00jl5mgk921mv4/39517986127.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/jagegexeposikovesur.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608853102b54b---lisodi.pdfPDF 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_off0000eed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED8 16852 bytes
SHA-256: 617c576e912af174a4a3f2626c77695a2c2af888f871d052d9e6efb174186685
font_01_sfnt_off00011af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13310 11200 bytes
SHA-256: 3c8a5359bbe48895e52585cb4c9412cecfdebe93d475bd98df7c24bfcf54e3a1

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