Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca791cc29f50d96…

MALICIOUS

PDF

49.6 KB Created: 2021-02-14 14:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6808c316278b2444c7bf4dad31b0e9a8 SHA-1: 7e54ef29a3b391c964838150af3dfd85fbb29a5a SHA-256: 8ca791cc29f50d96aec5ac0842b9957231b5c1ef0a65f7fb803e57d113573922
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains or link farms. The ML classifier and ClamAV detection indicate malicious intent, likely for phishing or distributing further malware. While no scripts were extracted, the structure and URL patterns suggest a common tactic of redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7460

Heuristics 4

  • 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 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://bologen.ru/aws?utm_term=school+of+rock+theme+song PDF link annotation
    • https://cdn.sqhk.co/zatugudaxaji/fhhG8ja/grist_mill_inn_hope_nj.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/jeNT0ge/wuruvu.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/a4jOVif/best_likes_hashtags_for_instagram.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421957/normal_5ffe987af0193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_5fdc572c88c7c.pdfIn PDF document text
    • http://simekavo.22web.org/gta_5_stock_market_guide_jewel_heist.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/gjjbhhn/tomb_raider_movie_2018_rotten_tomatoes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374207/normal_5fe298cfd57b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424361/normal_5febb77dda998.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/1Oiehhd/86905658028.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/cjenEhb/75752927018.pdfIn PDF document text
    • http://wifejopoxakobo.iblogger.org/40885703294.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/93204805242.pdfIn PDF document text
    • http://labofowidora.epizy.com/deduperez.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/nutesamowepekepa.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/zukenatopetexomidaroxa.pdfIn PDF document text
    • http://lowadof.epizy.com/causes_of_online_games_addiction.pdfIn PDF document text

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