Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e079084e3253597…

MALICIOUS

PDF

79.5 KB Created: 2021-04-30 01:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc8ebba374ccb1fe25389c0da10f4cce SHA-1: 7f06c7a563bbb7073ae9f7387b02bca6d326fd14 SHA-256: 2e079084e3253597b31c94c4145663d1536bac243440a5eb644fb5cf4c936266
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=casio+watch+aw-80+2747+manual
    • https://cdn-cms.f-static.net/uploads/4486535/normal_6052a557ab2d1.pdf
    • https://cdn-cms.f-static.net/uploads/4366311/normal_6039b9eeed80f.pdf
    • https://cdn-cms.f-static.net/uploads/4421341/normal_6050eaf9f0171.pdf
    • http://fukerijinexin.mygamesonline.org/satijijinono.pdf
    • https://cdn-cms.f-static.net/uploads/4365642/normal_603db4d9c2d09.pdf
    • https://static.s123-cdn-static.com/uploads/4371004/normal_6006cb9c48667.pdf
    • https://zulemogosisuwo.weebly.com/uploads/1/3/4/6/134689329/6426359.pdf
    • http://terakusinuw.mypressonline.com/english_synonyms_and_antonyms.pdf
    • http://bexemusu.mypressonline.com/retawegudowuzuzujefedotop.pdf
    • https://cdn-cms.f-static.net/uploads/4393762/normal_60543f3e64b68.pdf
    • https://static.s123-cdn-static.com/uploads/4456999/normal_5ff3731d94422.pdf
    • https://jamiwimavebu.weebly.com/uploads/1/3/1/4/131453695/fidinekomesibi.pdf
    • https://static.s123-cdn-static.com/uploads/4474446/normal_5fee6c0152b6d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wetevali/31788888007.pdf
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_188cb1c26bb0496daf5376c46971cbc5.pdf?index=true
    • http://gurabagoderes.atwebpages.com/keledasomozajudanomasiwap.pdf
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_df68b14a46394aaab1e5e3e37908e3f3.pdf?index=true
    • https://s3.amazonaws.com/nokiva/8933611333.pdf
    • https://4edd92ed-4e96-4c3d-a837-a16c7246ae9e.filesusr.com/ugd/7c3149_fe1d4c7f8d8847edb426404aeed31dca.pdf?index=true
    • https://s3.amazonaws.com/votubukaxogilix/pekamuguximini.pdf
    • https://s3.amazonaws.com/juliziwojatige/outkast_aquemini_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb6a.bin
45e675bb52ccde99455f43986ea7128927eb74a138f2e7238e10fc0b335c8091		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6A 5488 bytes
font_01_sfnt_off0000fe0d.bin
a7a441a1dc415bb7d115faf6acf3e252fad7528d048d9652188c7880adaab8ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0D 10748 bytes
font_02_sfnt_off0001229e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1229E 4324 bytes

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