Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82ef868a5840741…

MALICIOUS

PDF

76.3 KB Created: 2021-02-23 19:21:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d52960bdc191b635d1af9457965cb10d SHA-1: 77f6efa6b8eeb99b7f23ebb8c81ce0d379e13f3d SHA-256: d82ef868a584074110477a5854d0a1ba4db4accd445236bb93bc21f5b3586198
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting an effort to redirect users to malicious sites. The presence of external URIs and the classification as a link farm strongly indicate a phishing or malware delivery vector.

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=playing+card+games+in+english PDF link annotation
    • https://cdn.sqhk.co/nazujovo/hc6gegi/58035130100.pdfIn PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/7467947.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/tiwasul.pdfIn PDF document text
    • https://dejutuzalusabi.weebly.com/uploads/1/3/4/8/134869317/ae3a4c01a.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/Qpphcgh/t20_world_cup_2014_winner.pdfIn PDF document text
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/lakek-xikimajanab-kamixuluxefo.pdfIn PDF document text
    • https://zizonilorixu.weebly.com/uploads/1/3/4/7/134772478/vusutu.pdfIn PDF document text
    • https://mogisitubetaw.weebly.com/uploads/1/3/4/4/134496388/5552174.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/HidihXl/skiing_fred_mod_unlimited_gems_apk.pdfIn PDF document text
    • https://zazozoke.weebly.com/uploads/1/3/0/7/130776388/8806934.pdfIn PDF document text
    • https://gegirugotosizuk.weebly.com/uploads/1/3/5/3/135397722/xofobovu_kanolokoxoxeva_gomivebu.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/ZkYWgiq/candy_fever_game_download_for_pc.pdfIn PDF document text
    • http://woxupepij.iblogger.org/19587849663.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/libosokune/solegikajuzibupe.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/dagimejebod.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/claims_made_policy_extended_reporting_period.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/oecd_glp_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/gta_chinatown_wars_android_gameplay.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_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 5456 bytes
SHA-256: a06b6dd289e4e583fae727ea87e540261a3a180af03e1176b7b0d8b5369d6800
font_01_sfnt_off0001012b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012B 10324 bytes
SHA-256: eb4049d64b535f703aa3b5777b20c28f2022925b04840a998bcf0349aec09e78

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