Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c3e9f6484cbd56…

MALICIOUS

PDF

77.1 KB Created: 2021-03-21 08:29:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: eebbb5072c084b0526992f3b74f1d893 SHA-1: 2537b34a6ef74a713a9196f5c065d33bcb2bf2be SHA-256: f6c3e9f6484cbd565c945fe862c97b7a9314e2552cc935cec3cc86f4e3edbfbc
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on directing the user to 'seumenha.ru'. This domain is associated with phishing and link farming, suggesting the document's purpose is to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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/wix?keyword=roadworthy+stations+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424953/normal_602f61ec0fe49.pdfIn PDF document text
    • http://popukudaweg.22web.org/project_closeout_template_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501037/normal_5fdcd440a44f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386849/normal_60059e398cd96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_600bb222ca680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418567/normal_5ffc02849661f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393034/normal_603f1dd93b98d.pdfIn PDF document text
    • http://maporirunigis.22web.org/4950227298.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366627/normal_5fe54a492e689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503578/normal_605687a847981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410954/normal_600a8d67e1301.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482191/normal_5ffb7087f3bfd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78823e8-e0eb-430d-bfec-e8a0dc635938/8871233776.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/wanderer_above_the_sea_of_fog_art.pdfIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_8091521ba7f8483f8c2724526a14f39c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/jijojolek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec20127-21cc-4ed1-8679-41a679b53112/mechanical_engineer_in_construction_projects.pdfIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_19d9704ce0fa4f5d92197e120035c906.pdf?index=trueIn PDF document text
    • http://dupetomumipur.rf.gd/nidofutomesobuwudunubodak.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/lewimarabulopuxigimeginu.pdfIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_d078bc6dff8241fca3c47606a85f1c4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/321c9968-d574-40db-814c-e2dabea0c88d/maytag_neptune_washer_dryer_reviews.pdfIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_82a9bb0d6a8b4a6980b9456a300f3e0a.pdf?index=trueIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_60b9a12fd26844c79619de735673ce1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sezewu/kofisodokasiwima.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/9035895116.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_off0000f002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF002 5236 bytes
SHA-256: 6618b4b5795f2a0dc6fbb41f6bf04b5eb016403e0969a6ac1a9afb8883325a11
font_01_sfnt_off000101c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C4 10796 bytes
SHA-256: 1716d9f5ad281fe2e5e883cd5c8b730b06fff53d5df42d017fbc24d172f23c72