Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06eeb1535eb0b04…

MALICIOUS

PDF

75.4 KB Created: 2021-04-02 06:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e0d8723f6357ba41a5445fea9422bc88 SHA-1: bb72da82534fb3cd68d24e7e8d8b4e035fbfd56f SHA-256: f06eeb1535eb0b04129503e77b3b81bda3f03f99eaa445a9fa54c29b679e790f
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. The presence of invoice-related language further supports the phishing pretext. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious campaign, likely involving spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/award?keyword=borrowing+base+facility+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409801/normal_5fd27ffb61a66.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/hvCjhUK/24593732010.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/sotop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495402/normal_5ff40d09b07b9.pdfIn PDF document text
    • https://zejuvuvegodefi.weebly.com/uploads/1/3/1/4/131453892/jemonitakamimaxikij.pdfIn PDF document text
    • https://cdn.sqhk.co/momajuxu/g6Wgiha/venus_flytrap_care_outdoor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451208/normal_605661e81106f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407087/normal_5fecd231e7371.pdfIn PDF document text
    • https://cdn.sqhk.co/bewagolene/jhzRif4/26279409525.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370528/normal_60086819ad2bc.pdfIn PDF document text
    • https://salogisamokowo.weebly.com/uploads/1/3/4/6/134649366/loxutoxugozu-kategofefe-demikagiboma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_601378aa426f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_6a64692f15f646ad86e0d6e155ad260c.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_e176db0e00af45d997f3db178620e50b.pdf?index=trueIn PDF document text
    • https://59b17237-83b3-47c6-9d40-f547da5b0434.filesusr.com/ugd/827194_ab4f022e734a41e280d3c92defc11f3d.pdf?index=trueIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_530ba59919f843afa85f513c004bd937.pdf?index=trueIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_b1f00394459841049dbbcd91632397f5.pdf?index=trueIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_c9a5e877d51749fea4542e9b3dbc70f9.pdf?index=trueIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_f0f6d262e60d48fb93917052cc9e5b77.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_de3255bde7f44301b8db812d13d62190.pdf?index=trueIn 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_off0000e830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE830 5708 bytes
SHA-256: 4872144d3ea665bf30aeb8a6b3706b5d508271badc9dd8c10dce799b10724e41
font_01_sfnt_off0000fbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC6 10700 bytes
SHA-256: 4cfd3912274df12843ae97a0ba5ae90537a52d5ad17566b4623289356b9f0b59