Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4abfc421d5d2e1…

MALICIOUS

PDF

65.8 KB Created: 2021-04-02 07:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8de24cd6a82e6d9cc5c1bf301d60fbb3 SHA-1: eee16008524e733f3c776ecf45dd1b8fd1bc4071 SHA-256: 1c4abfc421d5d2e1a9851d38cd84eefc2b337790de501a738400ae3f7797fb49
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic indicate a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://lozipotod.ru/strik?utm_term=vans+old+skool+womens+shoes+blush PDF link annotation
    • https://cdn.sqhk.co/mezugifosa/hhjFJjb/bingo_dice_free_bingo_games_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_601f89f98d38a.pdfIn PDF document text
    • https://cdn.sqhk.co/dikonutudibe/jcgewmV/chatuchak_guide_2019.pdfIn PDF document text
    • http://golixudib.mypressonline.com/42410157768.pdfIn PDF document text
    • http://wavewozokuxa.getenjoyment.net/save_smaller_illustrator.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/ieghhcq/58491153928.pdfIn PDF document text
    • http://nawavidosuk.medianewsonline.com/muscle_building_workout_plan_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/tizesefetus/jfDSZgg/party_hard_go_0._10010_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kofatuziwu/aje9Kus/81261351882.pdfIn PDF document text
    • http://deutschebank-meine.com/56852681558az0ua.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458132/normal_600ef59fcf19a.pdfIn PDF document text
    • https://cdn.sqhk.co/lizupasepafu/ifWigjg/barero.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420244/normal_5fdffde783028.pdfIn PDF document text
    • https://cdn.sqhk.co/kevapaboxer/ha3ifie/cruise_ship_industry_news_today.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/5jhhbLQ/atomas_game_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454999/normal_604e2cab47df5.pdfIn PDF document text
    • http://tuzojexis.mypressonline.com/sogobix.pdfIn PDF document text
    • http://shishkin-seed.xyz/woraxijijikexojolufavudujc9ork.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_603c554748a9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nupotukig/borabew.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/jimmy_choo_song_djpunjab_guri.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A1 5228 bytes
SHA-256: 3a8f577df6cc5bdab32baf084bd7a6b32f59d30ecc7c6ddd912c25d143e3e2d8
font_01_sfnt_off0000d858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD858 10160 bytes
SHA-256: f09a101e7686a6872420d5d349c3e0bf2b1ee1b9196f5882791f0b113dbc09a2

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