Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b54e3ca3c9adc0…

MALICIOUS

PDF

53.1 KB Created: 2021-06-15 10:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2198ac19c881397808411bd5f05b464 SHA-1: 8b8266d0e0fe729509d8b1ee15198c12144d601b SHA-256: 04b54e3ca3c9adc02a3a41b9aec6ab81a6d81b123753ccbefc8df0d3587291d4
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as a phishing lure due to its image-only nature and embedded links. The document body contains text related to downloading a game, likely a pretext to disguise malicious links. The presence of multiple URLs pointing to compromised WordPress upload directories and disposable hosting suggests an attempt to distribute further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6644

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 53 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://chcial.ru/uplcv?utm_term=download+game+spintires+mudrunner+pc
    • http://nsdadventist.org/FCKData/file/berewotowivemiga.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160848135948b2---6138657317.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968b00267bf---jomebe.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1789cad05---sajifogoxatogel.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160725db8a0a15---78359043321.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803bcef0aa2---zedor.pdf
    • http://sanarina.de/ckfinder/userfiles/files/69994480624.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7705917a6---34515610535.pdf
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/40462207046.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/2f4000110becf23419de94cb0d8ff84a/zukumiko.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607411602fd9d---22898872470.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/b1d93c9b26edb324cda245c44fcbf8ba/tafabavos.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e517e36d02---71571046269.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/390bf0cfb91c77b9d1ff2f2cfb0d64bc/58743276529.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/jad65h10r8bpm6jjfhsrn8bnv1/26395236047.pdf

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