Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b0b27ce2bb1d27…

MALICIOUS

PDF

69.5 KB Created: 2020-11-16 12:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 38aa7288b9cf7634da0cdad835177542 SHA-1: 2272d16760fe10cfce7b01919eadc7a9f9d24d5f SHA-256: e9b0b27ce2bb1d27a6fb69fc1af728e771b84072ab9ba5d2a73d93e49994782b
186 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 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.
  • 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://traffset.ru/strik?utm_term=ue+mega+boom PDF link annotation
    • https://revamimetanezoj.weebly.com/uploads/1/3/4/5/134597499/fijowesuragug-wujisukomusid.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/c3a8b5d2104604b.pdfIn PDF document text
    • https://gozuvixonoj.weebly.com/uploads/1/3/4/5/134517501/2338828.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/5a99bd81b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496225/normal_5fabc1be168cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_5f95f3c04bc03.pdfIn PDF document text
    • https://xilamakiluf.weebly.com/uploads/1/3/4/6/134668497/8604999.pdfIn PDF document text
    • https://pubetisor.weebly.com/uploads/1/3/4/3/134348812/muximoforo.pdfIn PDF document text
    • https://wizaxonaguwaxi.weebly.com/uploads/1/3/4/3/134306690/guvizaliwasezel.pdfIn PDF document text
    • https://nugaramavamog.weebly.com/uploads/1/3/4/3/134320686/gutijojojabiliwaw.pdfIn PDF document text
    • https://tumekisegazuf.weebly.com/uploads/1/3/4/6/134611428/vovilorafaketure.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/seselovad_gejuvo_remuwinefija_nunotakug.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/xelimewat/percent_error_practice_problems_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6220f94-9ce3-46d0-b1bf-913dffc2f82d/40523594143.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/nutricion_antienvejecimiento.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 8

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_off0000d26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26B 4832 bytes
SHA-256: 6a77ab8a2cbcb6e8d82b94f72743dd5c57a1e3297b08a0d9d87a802898a97daa
font_01_sfnt_off0000e2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CF 11436 bytes
SHA-256: 2dd968db58540a37a1f1e3720249c5496b539797be8fddb635d08eb4d1736478

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