Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f57af6a3a2517a…

MALICIOUS

PDF

76.1 KB Created: 2021-02-15 18:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: db246737188ff15dcc55dbe95fee5ce8 SHA-1: 6f2294dfdd399320932c06a37a9d2c834a9f5de9 SHA-256: c6f57af6a3a2517a034783b98f0916233754515786d31e3ed397196e427fd9e7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to 'maypoin.ru' and a keyword related to pricing, suggesting a phishing or scam lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious websites.

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://maypoin.ru/wb?keyword=autocad%20software%20price%20in%20bangladesh PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467573/normal_60120d75b7c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497666/normal_601fd5758a6c6.pdfIn PDF document text
    • https://zetokefukakebep.weebly.com/uploads/1/3/1/4/131438441/6229410.pdfIn PDF document text
    • http://front-glass.space/fojekoxenezoxoxijupamx2j6o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473410/normal_5ff028b7a5b82.pdfIn PDF document text
    • http://luchdobro.site/marketing_strategy_framework_modelbuzx2.pdfIn PDF document text
    • http://ses-paypal.com/funuradulm2di8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420431/normal_60213ffae1d32.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/sisaxu/xunivinezodifa.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/mozixesutevoputobijuji.pdfIn PDF document text
    • http://wemopax.rf.gd/song_transformers_bumblebee_tunnel.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/march_of_empires_guide_tips.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/apheresis_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/abbreviation_of_file.pdfIn PDF document text
    • http://pixoralozod.epizy.com/settlement_statement_template_wa.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8A 5640 bytes
SHA-256: e4377e4fc5953baf061a73fa83c85d5243812808f4c3a99b849a96090d2e2ae8
font_01_sfnt_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 3852 bytes
SHA-256: bec7a4ef2b6abc0f8b4d5cd61dcb85e73abff0d238454ecaed4d8568c9b8f0d0
font_02_sfnt_off0000fabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABE 11880 bytes
SHA-256: 3f8a506f9b28f7f5c0d226f7df071c31a951d7b50385a8d36afbc17e7e0750ad

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