Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f34641466c96eb8…

MALICIOUS

PDF

64.2 KB Created: 2020-12-07 12:34:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 41142a840161c94eff1577bc90ceb4c9 SHA-1: d765babf099ebeadec5a7daeb1db405b89ae73df SHA-256: 5f34641466c96eb87999404747b27fcd1217943f7d43473933820a5fdb01664b
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://traffking.ru/123?utm_term=fish+table+jammer+device PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485445/normal_5fbbdf0f9fb3a.pdfIn PDF document text
    • https://nenerulo.weebly.com/uploads/1/3/4/6/134696163/5f33dfc753a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5fc186493f45b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5fb2dded5ede1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5fac518b8810b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424682/normal_5fc7328136e78.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf07be6d49a06bb5632c0/1606283387990/ponivufejudujujub.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/bc_pnp_business_plan_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/48922210015.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e90c27a199023ab56552/t/5fc1634c9b1ed035381011cd/1606509389367/championship_soccer_game_saturday.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d766a3bf4b14aba8e616/t/5fc2d2b8bc819f1cf43619b7/1606603451534/zedoninuropotururebemugo.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/lozojojivilivejofezajawed.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc35e67cd1e280355e3f728/t/5fc4ae6308845d09241e3d12/1606725220935/cyberpunk_2020_rulebook_diversity_and_unity.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 1

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_off0000bef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF7 5408 bytes
SHA-256: 16d6a2056211b0dd149eca9d4d11101d08f25123056fc9abe880378c973c4426
font_01_sfnt_off0000d13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13D 10436 bytes
SHA-256: e173f86b14261081f4c79b4132198bc6d274b0a6a1ffed4c6cfd245cca0f620a

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