Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a52901d15a6c3e1…

MALICIOUS

PDF

58.4 KB Created: 2021-03-29 01:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6ade66b51d17c2944059b0a6324d7ed1 SHA-1: 1f55411837bd03b7604ec3a5d50868b584391766 SHA-256: 8a52901d15a6c3e1f07f07793a6039169a06b9232b2ca6c7ee43e4b40ded8d79
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8425

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
  • 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.
  • 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://vilenefex.ru/aws?utm_term=m-audio+fast+track+usb+mk2 PDF link annotation
    • http://jisubumutowegur.22web.org/basic_origami_book.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/zozamuxv82q.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/gfaignn/word_blitz_game_online.pdfIn PDF document text
    • http://natikolom.site/sidovibapezuxux07tk4.pdfIn PDF document text
    • http://rolazipomi.22web.org/66154539601.pdfIn PDF document text
    • http://arevakar-travel.com/wazataraloraz0aco.pdfIn PDF document text
    • https://pemalerokefoge.weebly.com/uploads/1/3/1/6/131606165/xirifexoxi_xadokujizulovod_litaroxatu_zoxemunusilone.pdfIn PDF document text
    • https://cdn.sqhk.co/varaxupumami/L3gfiiA/autel_maxisys_elite_update_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/iihytjh/piggy_book_2_trailer_theme.pdfIn PDF document text
    • https://defasoxajex.weebly.com/uploads/1/3/1/4/131405962/boxulot.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/gross_the_science_of_mind_and_behaviourn0bol.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/iijd8jf/meltdown_premium_apk.pdfIn PDF document text
    • https://fivugolukebil.weebly.com/uploads/1/3/4/9/134902908/6961658.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/Xja6Zhg/ringtones_and_wallpapers_for_me_full.pdfIn PDF document text
    • https://cdn.sqhk.co/pizibimo/RmgdgiF/palivefeti.pdfIn PDF document text
    • http://belplitka.ru/pageximajunupafuludaxema8f2sm.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/j8VjiXA/tank_defense_red_alert_command.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/cO2he3n/merozejosifuvutu.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/vopupesib.pdfIn PDF document text
    • http://xupikilagi.rf.gd/free_spending_tracker_template.pdfIn PDF document text
    • http://kagewopojitij.epizy.com/business_process_reengineering_steps.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/49870879699.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/chaal_jeevi_laiye_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/definition_of_reading_aloud.pdfIn PDF document text

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