Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd8144b50b9a99d…

MALICIOUS

PDF

460.1 KB Created: 2021-06-13 07:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 89cc9ee73ac8fe4e1392bc4e0585c315 SHA-1: fdbc9f3193a8eee4356d7a4495368c09bf71670e SHA-256: 7fd8144b50b9a99d173530d4d7aae0e50e2ce219c3354e81d1160287463d2aaf
334 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious File

This PDF document exhibits multiple high-confidence heuristics indicating a fake CAPTCHA and clipboard command execution lure, designed to trick users into running malicious commands. The document also contains embedded URLs pointing to potentially compromised WordPress sites, suggesting it may be part of a phishing campaign. While no scripts were directly extracted, the presence of these lures and the ClamAV detection strongly suggest a malicious intent to execute arbitrary commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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
  • Fake CAPTCHA with command-running instructions critical SE_FAKE_CAPTCHA_CLICKFIX
    Document combines fake CAPTCHA or human-verification language with instructions to paste or run a command — a high-confidence ClickFix pattern
  • 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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crewmak.ru/uplcv?utm_term=video+trimmer+like+whatsapp+android+github PDF link annotation
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/91oatsl4ru7dsiork0ramj26v9/18163445078.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/d3095909cfb40625088e6cb33b75eeea/wofif.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/48478866863.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/retirururozopetote.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c521d33046e---63369403368.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/gorajuniziwano.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609954c29fddd---9063442187.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d6321332e---kagiwe.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16092c036cca74---jawarijifipebe.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0aab7b6de0---39466866755.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/nawudozasananopebume.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c37bfda4e18---28597238044.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/vatupa.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/95d9963720a9a3ffc054375915caf310/pawasubaxuforuluzow.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/c4a3a04a983d1bcac6df85309bcc9994/tevovijunazuses.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/r5u66imk5r674bn4q2ca7n911v/maxofazosejumenu.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1a338919a---fotajakatoxiworufosogup.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/49755893221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0006e079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E079 5636 bytes
SHA-256: 5707f46c4402d49bb25cb39edc7a1b750028c5806c4e76037d60d366e42be3fa
font_01_sfnt_off0006f37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F37D 13524 bytes
SHA-256: dbe53281474a09ddee7ce1e0dd7088b66d4297eb48ac35d2d8b5b5bb9d275317

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