Malicious PDF — malware analysis report

Static analysis result for SHA-256 3028ce707426d658…

MALICIOUS

PDF

42.9 KB Created: 2021-03-29 13:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 70d427ad0d8945e83cd6f8a93da17034 SHA-1: 69e83d4fa64447ac8327570c87656c796399f5c1 SHA-256: 3028ce707426d6589023fa140eefea67201fe65d93d34e7685bf1329126b889b
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure due to its image-only nature and embedded action triggers. It functions as a link farm, directing users to various external URLs, one of which is `https://nipisod.ru/award?keyword=caselet+di+pdf+ibps+po`. The document's structure and numerous external links suggest it is part of an SEO spam or phishing campaign, likely intended to lead users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7383

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 42 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://nipisod.ru/award?keyword=caselet+di+pdf+ibps+po PDF link annotation
    • http://sumapewub.getenjoyment.net/98196689689.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/djfijhg/events_in_atlanta_next_weekend.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/47447250761.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/ig1BCjh/dragon_quest_11_costumes_stats.pdfIn PDF document text
    • https://cdn.sqhk.co/jaruxabal/rgigejb/carson_wentz_contract_per_year.pdfIn PDF document text
    • http://ketoxitigojaluk.sportsontheweb.net/ligotanedixonet.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/idjixgg/kokavivez.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/xusadusibozotevuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c9895d-2c2a-40be-8abc-fce2a784078e/3083297888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/774ee2e5-0bd7-4de1-ad8e-41d72db312ae/katzung_pharmacology_board_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35f4ba2-9e4a-44c2-a347-a65baa53e55d/how_do_you_heal_your_soul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb13abe0-d18b-450d-ae30-84e48b8112b8/how_to_assemble_total_gym_fit_max.pdfIn PDF document text
    • https://eb22cd64-ba88-4d74-9269-d2b8937e52af.filesusr.com/ugd/3b217d_1d80b90183ab45a3aab020a055d13875.pdf?index=trueIn PDF document text
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_1ad572c8e420459b9c7cd265ed4d5323.pdf?index=trueIn PDF document text
    • http://pedorusare.epizy.com/50573711171.pdfIn PDF document text
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_6629fe89b96a41b4ad2261284f9d9eba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb03b55c-9d0b-4546-8339-ae29e16a3cc0/harley_davidson_repair_tools.pdfIn PDF document text
    • http://vumojixo.epizy.com/burndown_chart_template_google_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e3e753-de70-4b49-b329-857c72507dfa/how_to_change_the_filter_in_a_lasko_tower_fan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd3fed3-873d-4da4-9f5f-21fcc27bd12b/7152195948.pdfIn PDF document text
    • http://lumalidik.atwebpages.com/wizukawad.pdfIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_4af67f77c737430583635e7f6fb36ead.pdf?index=trueIn PDF document text

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