Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7526f836f05cba4…

MALICIOUS

PDF

59.9 KB Created: 2021-03-20 08:29:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bedcd1147b9f40fb005483a70fcafa7 SHA-1: 5348412bb884a150dad8fe389ebcf09d7a0cf67c SHA-256: f7526f836f05cba487e9dcda5239a9169efec911b189c031322eb83fe139e7b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one identified as a potential link farm designed to direct users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were extracted, the presence of embedded URLs and the heuristic firings suggest the document is designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7016

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/award?keyword=capstone+reflection+paper+pdf
    • https://cdn.sqhk.co/wezufunin/itgVJhg/88552681176.pdf
    • https://cdn.sqhk.co/balaragu/ifM11zS/neon_free_trial_game_of_thrones.pdf
    • https://cdn.sqhk.co/ninilevikod/1hidgfQ/download_game_subway_princess_runner_mod_apk.pdf
    • https://cdn.sqhk.co/rixakowu/V0qhjd7/97012747631.pdf
    • https://cdn.sqhk.co/mowamukar/bgh2PcW/black_forest_cake_crazy_food_makers.pdf
    • https://cdn.sqhk.co/nasubivapu/hgdLAjf/tasixoxumojojama.pdf
    • https://cdn.sqhk.co/wowixepis/uLl3ieR/21862242152.pdf
    • https://cdn.sqhk.co/tigixexaxi/WKjdjgd/subway_surfers_unblocked_crazy_games.pdf
    • https://cdn.sqhk.co/rubutemoxe/dbbgcgg/xinazivusufelopikasujil.pdf
    • https://uploads.strikinglycdn.com/files/78bb4d43-48cc-4188-a518-5b9d328ee8a7/how_to_make_a_bean_bag_toss_carnival_game.pdf
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_e02c97b4ae4749ffb9d8464f4a6302a8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ac8c89dc-78f8-464d-84eb-94412e05c5d6/how_to_replace_timer_on_kenmore_500_washer.pdf
    • https://s3.amazonaws.com/fokapikow/savomunemelutewigife.pdf
    • https://s3.amazonaws.com/viromibukoleliw/mimanor.pdf
    • https://s3.amazonaws.com/gifiz/wipozojumebe.pdf
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_b3f0c6853a5845b988c889640feb6fd5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2b384c06-f45a-45ab-84d9-f0a264f66056/4908694964.pdf
    • https://uploads.strikinglycdn.com/files/6b60772a-c80a-4ab8-a3c2-1202577d0175/5_love_languages_quiz_free_goodnet.pdf

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