Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c88d8254a743968…

MALICIOUS

PDF

72.2 KB Created: 2021-01-02 05:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 749b1fcdc58942f9345337d27cfef58e SHA-1: 997ad44c21fd51e358baa08e0aa24423f8a67db7 SHA-256: 3c88d8254a7439685a9427955a0a8035bd5bae1212b7b71c24718e9492315449
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/123?utm_term=hp+laserjet+pro+m402n+drivers PDF link annotation
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/vizuwam_xanamobeledufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_5fe98de531f8e.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/ji0ibjg/marketplace_foods_menomonie_wi_weekly_ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_5f95f25679fd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_5fdc6e58d5731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459324/normal_5fa7c499ac66a.pdfIn PDF document text
    • https://cdn.sqhk.co/pavuraxutem/RLahh1x/hex_empire_2_free_online_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_5fb5b39dcd354.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/nawosineromigi/60771583670.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/bibliografia_tipo_vancouver.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/zoseruxixanirasizaxenomej.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/aromatic_compounds_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/best_reader_app_for_windows_7.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 5564 bytes
SHA-256: 99a33ab2ab74124396f1453ab1cb43582668832a3758f93b62e71eac10896266
font_01_sfnt_off0000eed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED5 10720 bytes
SHA-256: c5995070a9122978d35a84b51e829692619a68ed552aa6322b837e58d0d6eeab

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