Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e2bff3db9696cd…

MALICIOUS

PDF

54.6 KB Created: 2021-03-11 12:49:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e123cc72193af90bced15e261c12940 SHA-1: 4af66fddf03c4999bdffecad7482c79aa27a35df SHA-256: 42e2bff3db9696cdac07affd06654259c2af0cb4462740d3e17ffdd22c464a5f
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The PDF_IMAGE_LURE heuristic indicates it uses a screenshot to hide a clickable action, likely directing users to external URLs. The presence of numerous disposable links on potentially untrusted hosting further supports a malicious intent, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7061

Heuristics 5

  • 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 54 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://jacksth.ru/aws?utm_term=ti+89+titanium+manual+espa%25C3%25B1ol+pdf
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    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_c5aab36ee17845e988ecdaef1259b4be.pdf?index=true
    • https://s3.amazonaws.com/budovewesekaz/duledisuxugut.pdf
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    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_ad840e92a25340af9c9b9f4763026a41.pdf?index=true
    • https://s3.amazonaws.com/jojitagifuva/gotigabofa.pdf
    • http://nevabaza.atwebpages.com/adobe_cc_suite_price_in_india.pdf
    • https://729282ec-1290-4cbc-9302-cf8a24acd4c7.filesusr.com/ugd/42c189_a50de15393f04e10a7a72b9033933377.pdf?index=true
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_2828d071933642bda4c35af6d9ffb8c2.pdf?index=true
    • http://kaxawinozuv.epizy.com/bhagavad_gita_in_english_book_free_download.pdf

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