Malicious PDF — malware analysis report

Static analysis result for SHA-256 4760f2281ec7525b…

MALICIOUS

PDF

79.3 KB Created: 2021-01-25 12:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d5bf69fde1fa8078994d5c3d93072cb2 SHA-1: d25cb41e3952260b7aa268c47c6b0b05ba6ec24c SHA-256: 4760f2281ec7525b4021c567349e0c57296c4ab2adddc8f96a94ae4eabee1383
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, and includes a UTM parameter suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious websites.

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://trafffi.ru/123?utm_term=minecraft+world+edit+commands+replace PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443344/normal_5fd0e245924b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490547/normal_5fec0c5be416c.pdfIn PDF document text
    • http://businessoutsourcing.org/wefuwogisamzuxzv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412174/normal_5fea0a67b124d.pdfIn PDF document text
    • http://center-about.com/rojipetiwexejaruvn7cp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409396/normal_5fdf9cf029d94.pdfIn PDF document text
    • http://banque-populaire.best/739265176926o526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450634/normal_5fd2d0d2e9428.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394068/normal_5ff5eed643c34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5fdc653c5f8bd.pdfIn PDF document text
    • https://demaxezobenila.weebly.com/uploads/1/3/1/8/131856353/dujivosoga.pdfIn PDF document text
    • http://rollernefrit.xyz/944967324hbthg.pdfIn PDF document text
    • http://milesnires.xyz/nail_salon_home_service_near_meges1q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_6005639a90ec7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475588/normal_5ff8f0f50da74.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/b81221e6838da7d.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/tuxexi/99551325556.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/schengen_visa_france_application_form_vfs.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/beautiful_trauma_live_performance.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_off0000f6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CC 5400 bytes
SHA-256: 1a67604db662d097d4f14e7c8b8a653e4eb3e73e1595623fd9bb446abdab5b61
font_01_sfnt_off0001092f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092F 11148 bytes
SHA-256: c72407808c541ebd367455b5ff23f97581a778518935d1d498c6896c03f2da96

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