Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b5524a0df3e7ec…

MALICIOUS

PDF

38.0 KB Created: 2021-03-09 23:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 78ac1080c742765b8b124bc08ed652b2 SHA-1: 041b21d4c612512b76457c84c52dc43c6dd2499d SHA-256: d1b5524a0df3e7ecb6f11035a4992946c22e7cbb822fe89c72e56dccfc952cf7
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6767

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://zajinet.ru/award?keyword=baricco+oceano+mare+pdf PDF link annotation
    • https://cdn.sqhk.co/piravasufinu/iPYjchg/wirizeguvuziraxebalaga.pdfIn PDF document text
    • http://voirop.xyz/party_next_door_downloadbxopn.pdfIn PDF document text
    • http://lightstart.xyz/10281239663v9zwn.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/cHhcji7/super_contraption_full_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/hfheidv/sally_s_hexagon_number_puzzle_5b_answers.pdfIn PDF document text
    • https://kisofoga.weebly.com/uploads/1/3/1/3/131383553/gomadaz.pdfIn PDF document text
    • http://forsage.pw/comentario_biblico_adventista_mateo_15e07c3.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/58360310097.pdfIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_02458b42012f476cab49a9f0af540543.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/how_do_you_get_a_free_phone_from_metropcs.pdfIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_afcac53fbb774fe6be63c9f0dc8ce198.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_4fIn PDF document text

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