Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaf0f33be66d1c9…

MALICIOUS

PDF

80.8 KB Created: 2021-01-07 21:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ca71d0f14535fb569eba840a3ec5961a SHA-1: 948c093cc593a7d3eee4dca11f53656bb3134765 SHA-256: eeaf0f33be66d1c944976e7330d1fce2c9362139b84b26281b1061ddde4f409a
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV also flagged this file as malicious, indicating a high likelihood of phishing or malware distribution. No scripts were extracted, but the presence of multiple external links suggests an attempt to lure the user to malicious sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://traffmen.ru/123?utm_term=ggg.com+girl+go+games+online+free In PDF document text
    • https://cdn.sqhk.co/waxipefimafa/Ihi3giA/fapadozuleroboretimegedak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5f8edcaf73424.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/geijvhf/lajisozemotexavipebive.pdfIn PDF document text
    • https://diloxutal.weebly.com/uploads/1/3/4/5/134598378/e4735ad29ba.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/gciiVS3/kozemubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5f978e2c37741.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/hviigja/xonetelovotenozo.pdfIn PDF document text
    • https://jatokogeredere.weebly.com/uploads/1/3/3/9/133997843/remowekagisovowowet.pdfIn PDF document text
    • https://tujowijide.weebly.com/uploads/1/3/0/9/130969571/lozazewoperiwiv.pdfIn PDF document text
    • https://kodidorimo.weebly.com/uploads/1/3/1/3/131380292/5678625.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/38072029666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d8bd9ee-2bc4-466b-9dfe-ad07a1481f8f/hybris_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/xitazomatoxogulugegu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF337 4972 bytes
SHA-256: f73fef0254a52256035924ae25a44fb1d96fb008df905aeadcb317afb54d161b
font_01_sfnt_off00010404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10404 10644 bytes
SHA-256: f8e04372626f5b87ecee92e57109ee028d73297017c8d0465e7982cabbe89640
font_02_sfnt_off00012832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12832 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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