Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eeb3ede74ebe771…

MALICIOUS

PDF

75.5 KB Created: 2021-02-23 07:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 160b225f9682cfd771d27ca29e8a2a2f SHA-1: 29bd3a1c59115092ee42fb6d8ec93823833aa312 SHA-256: 1eeb3ede74ebe771845fba6730c24a8964d4098287f25cd30816114f8e2ddda8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, which is a common tactic for phishing or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the link farm heuristic suggest the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://leonvi.ru/strik?utm_term=bengali+to+english+translation+book+pdf+download PDF link annotation
    • https://cdn.sqhk.co/zanotunuzi/ihcGQUL/global_citizen_meaning_in_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504047/normal_6022d8453735c.pdfIn PDF document text
    • https://cdn.sqhk.co/wamedexipun/fPjJthb/strategic_planning_process_with_diagram.pdfIn PDF document text
    • https://rokawutavepuma.weebly.com/uploads/1/3/0/7/130776645/julitarafujufe.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/bmgfjg4/promised_lands_1974.pdfIn PDF document text
    • https://cdn.sqhk.co/wewisadavoj/hjGrejg/81922311267.pdfIn PDF document text
    • https://repepojopojak.weebly.com/uploads/1/3/5/9/135970902/b098b23815.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/f4nLxGo/xowidovapijexam.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/liggcDy/space_program_skateboards.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/dHgdJih/53623289775.pdfIn PDF document text
    • https://cdn.sqhk.co/nafusomo/djjZkEe/36456358907.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/sugowubuf/vidositopamo.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/72285761897.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/tumbler_cup_order_form.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/xikop.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_off0000e9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B1 5648 bytes
SHA-256: 309bfe4dd6987b4302a8fcfcf93d094c9208823904418d4669c84978064aa3e7
font_01_sfnt_off0000fcf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF1 10824 bytes
SHA-256: 0ac4179634f03b4e3946508f931333126dcaeeaf3fbddf126be07765943eca7c

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