Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e0da4830cf3ac4…

MALICIOUS

PDF

77.2 KB Created: 2021-03-08 13:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: a3da4de96af29c21d2053188994bc034 SHA-1: 485ef236b2f86d9c065e38d59ec4054815bdbff4 SHA-256: f2e0da4830cf3ac47e8b0349c15a0bb9bc886c1d44c20bc21f2c08810dfbedea
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary malicious URL identified as 'https://seumenha.ru/award?keyword=hernia+hiatal+por+deslizamento+pdf'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

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 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://seumenha.ru/award?keyword=hernia+hiatal+por+deslizamento+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388158/normal_601f845e4b45c.pdfIn PDF document text
    • https://wipukanutunuk.weebly.com/uploads/1/3/1/4/131437017/6923109.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/worenofeletoganeg.pdfIn PDF document text
    • https://jorazejub.weebly.com/uploads/1/3/2/6/132695428/gowuzaposigolilem.pdfIn PDF document text
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/peminov-repifitum-zarijuzuw.pdfIn PDF document text
    • https://xudepafuvinuk.weebly.com/uploads/1/3/0/9/130969511/dililamupamadidirisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454432/normal_5fdbe56c9e06d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418565/normal_5fde1f60df6f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463552/normal_5fe6d6731bba8.pdfIn PDF document text
    • https://miluxeto.weebly.com/uploads/1/3/5/3/135326788/gemuno_mamedunax_kagikog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://savikolapuxol.rf.gd/animal_farm_book_review_quora.pdfIn PDF document text
    • http://resibifamopoto.rf.gd/33427318251.pdfIn PDF document text
    • http://bulofowomogi.epizy.com/fifty_shades_of_gray_book_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182023a6-69c1-4145-9c5e-2dae306a40e6/19801484339.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_b0f8eb6d68414c35b0fa21dce3fc63cf.pdf?index=trueIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_91689635ab26447ca9373aadb0b7af43.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f089bf43-3630-4474-a036-b38e01c78e3e/diwexisukosab.pdfIn PDF document text
    • http://zuvodokisezimim.rf.gd/sobawonuxit.pdfIn PDF document text
    • http://lerapavuzuloz.epizy.com/information_theory_the_big_data_reading_answers.pdfIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_4c28d3d4eaaa4d77b99e9ebb805c35d0.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_off0000f3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E3 5292 bytes
SHA-256: cc5f37a161e3e4e94b0d9ce40fc9e3a66200bbae520fdbf2bc5be1e0601784a3
font_01_sfnt_off000105bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BB 9872 bytes
SHA-256: fa2686be0123a127d2a21b385f9e918738776d5d88d1ecfa2a5fe0e51ea97cf5

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