Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9040046cee35ed2…

MALICIOUS

PDF

64.6 KB Created: 2021-01-26 10:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c56bfda623e0bbe1767f50228d678aa0 SHA-1: 751b1afa79a35d29f2558e7ec9c1a22893abfe41 SHA-256: c9040046cee35ed2e0fb262a91d24c6a524253273e133bc268b4b5151e75c77a
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, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with attempts to redirect users to malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=dig+dug+trophy+guide PDF link annotation
    • https://bomazadoxu.weebly.com/uploads/1/3/4/4/134474586/tobibexipem-rotagavefuri-saworuj.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/qihhhNu/maze_runner_maze_monster.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443325/normal_5ff5296db2d4a.pdfIn PDF document text
    • https://dejewetekexofig.weebly.com/uploads/1/3/0/7/130775583/latipu-tiwefovuxoluj-rolevitizix-polom.pdfIn PDF document text
    • https://cdn.sqhk.co/vegubefeno/bsMgfjh/emancy_borderline_war_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/uvja87z/68834441130.pdfIn PDF document text
    • https://sixalusizefew.weebly.com/uploads/1/3/1/3/131378898/ccf95.pdfIn PDF document text
    • https://roxuvipiga.weebly.com/uploads/1/3/4/6/134637137/lelevobidenemu.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/iiiDAib/the_big_bang_theory_whip_sound_app.pdfIn PDF document text
    • http://lunurapezos.iblogger.org/murexivuruka.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/XChaMjg/grim_soul_dark_fantasy_survival_offline_or_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kovusilo.epizy.com/bonsai_cuidados_basicos.pdfIn PDF document text
    • http://vozoxutizetu.epizy.com/76321045366.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/jomezitimuweluzukijipabad.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_off0000c141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC141 4904 bytes
SHA-256: d5bd9cfa7441fea1b0960a72d411ed1645de6269f50c23b7f594c3ff6cf623b6
font_01_sfnt_off0000d1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FB 10532 bytes
SHA-256: 52685118a33cbc52a02dc42a4af46c8cf6cf5214ef72328279ead766e8908da0

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