Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0651f665e307e6…

MALICIOUS

PDF

73.9 KB Created: 2021-03-30 01:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 54cb14e36c9938bd5f9bb1d88d0185a0 SHA-1: b7742d5f8731cbfafcadb46eccd1bb3cab106162 SHA-256: 9c0651f665e307e6f57f2c97264ec211f1c23d715f9e068f07c9e58d7401048e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://seumenha.ru/strik?utm_term=how+much+is+a+cable+box+from+xfinity PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372086/normal_6058d4cd261f4.pdfIn PDF document text
    • http://rigekuxinitevov.iblogger.org/farixefosadegiwafib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_5fd7ef062def5.pdfIn PDF document text
    • https://rivewatot.weebly.com/uploads/1/3/3/9/133999312/7b9a940207e6639.pdfIn PDF document text
    • https://fuwamelewupo.weebly.com/uploads/1/3/4/1/134131589/liredijewasara-kifejatovo-zajenigufot.pdfIn PDF document text
    • https://bikojeril.weebly.com/uploads/1/3/3/9/133999271/xovabebezudatipij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374518/normal_5feb240fbc14c.pdfIn PDF document text
    • http://getporte.xyz/the_titans_curse_noveli6ezn.pdfIn PDF document text
    • http://erogan-encolumbia.site/ruwikiwunazaxivibusugape2bngj.pdfIn PDF document text
    • https://gegefajowib.weebly.com/uploads/1/3/1/3/131380265/2133862.pdfIn PDF document text
    • https://babaketejo.weebly.com/uploads/1/3/5/3/135304919/1611004.pdfIn PDF document text
    • http://gufutaca3.xyz/76219101064xzz7d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guvamimifufirar.rf.gd/73607205742.pdfIn PDF document text
    • http://ruxomipeb.epizy.com/year_6_long_division_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb0b837-80f5-4192-91a1-5aeab53f6712/bubetamuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ce1962-e64a-45bf-bfc8-2a38d0139926/remington_700_sps_tactical_box_magazine_conversion.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_off0000e061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE061 5484 bytes
SHA-256: 7a1b53a11d7ce1524d54bfb6005be73ab1088f6bacb647e78c6dc67fba75aa6d
font_01_sfnt_off0000f2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 11304 bytes
SHA-256: 57fa291f8fa768a57e201aca42aa6b9c0bde392bcd7b79ddb649ad69212c58f7

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