Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddf2b939f21792f…

MALICIOUS

PDF

71.5 KB Created: 2021-03-16 19:17:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 85ad18c8b8a75a8e0620a2b62f838457 SHA-1: 1dc7db373f5ccdba848a02b36b096e0866152c55 SHA-256: 0ddf2b939f21792f1f56f000849d507591c9fe12a7f725ceb36f1dd7e65efb7f
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting it is part of a link farm designed to drive traffic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=best+cancer+free+diet PDF link annotation
    • https://cdn.sqhk.co/fumamimed/ejdicAH/xogujalan.pdfIn PDF document text
    • http://lomizagin.iblogger.org/vetekodopepu.pdfIn PDF document text
    • https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/231fd119975.pdfIn PDF document text
    • https://degevibuv.weebly.com/uploads/1/3/5/3/135316410/nonolaxefif.pdfIn PDF document text
    • https://cdn.sqhk.co/bafuberudod/h7ihd2q/potemajoduritovipomi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420589/normal_60008d742f3d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486033/normal_601a52601ad67.pdfIn PDF document text
    • https://jadetikoj.weebly.com/uploads/1/3/5/3/135350844/tidonaf.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/iiXibij/vajizafez.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/jdgd0jj/retro_snake_puzzle.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gulodolowupusaf.epizy.com/baves.pdfIn PDF document text
    • http://fuluputig.epizy.com/album_wanna_one_boomerang_planetlagu.pdfIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_9ce0db68ec4243fa8479f84ea5723ef0.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_3235518cca9346ddb3b4562778b82b6c.pdf?index=trueIn PDF document text
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_fe0de731f55e4a57aabf49e51a26e52b.pdf?index=trueIn PDF document text
    • http://jexesixikagudix.epizy.com/dadopuzanigorupolufu.pdfIn PDF document text
    • http://xitozafa.epizy.com/66745633196.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2A 5032 bytes
SHA-256: ce9529111dab898cdd809510ad46b107caa6873c37796d20cf9b111003a266bd
font_01_sfnt_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 10628 bytes
SHA-256: ce534825655933ba455105ecb21349bfb1fc2e4299c100c7998d47145e31467f

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