Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e933046e011bd9…

MALICIOUS

PDF

64.8 KB Created: 2020-11-11 18:17:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30d7f0932c037733c063ff8a07ed04b6 SHA-1: 138ac42ecc1eab5d42f75d8acac5f313e00c09ab SHA-256: 08e933046e011bd998b221ca4935b57437117bad21d4709a0fd187654e76ea06
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to 'traffset.ru', which is flagged as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. No scripts were extracted, but the embedded URI and heuristic firings suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://traffset.ru/aws?utm_term=powerscore+logic+games+bible+2018+pdf
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f871ad03d873.pdf
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f8b75be708f1.pdf
    • https://pakedarisibibo.weebly.com/uploads/1/3/4/5/134501134/3324521.pdf
    • https://bokasopuvozanib.weebly.com/uploads/1/3/4/3/134319525/zejutuvijidofezojad.pdf
    • https://lififotepul.weebly.com/uploads/1/3/4/3/134339298/6118641.pdf
    • https://cdn-cms.f-static.net/uploads/4389601/normal_5f956c377a4fd.pdf
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/3875917.pdf
    • https://cdn-cms.f-static.net/uploads/4476147/normal_5fa5b81275040.pdf
    • https://dadixuva.weebly.com/uploads/1/3/4/0/134018012/83cff40b09e.pdf
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f96a454f0684.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b54a43ee-3c9b-4a38-aa2d-cfbb182d93d0/dragon_powder_conan_exiles.pdf
    • https://s3.amazonaws.com/wilugugo/spatial_point_pattern_analysis.pdf
    • https://uploads.strikinglycdn.com/files/d8b0039e-eda7-406e-80f2-cf11bd2bdd89/14618944095.pdf
    • https://uploads.strikinglycdn.com/files/09769dbf-4022-40ce-a401-6294e68e0eec/zizevakeropaxisuguxo.pdf
    • https://uploads.strikinglycdn.com/files/887fdd10-23c6-4c75-a919-83ed9383b06e/pirates_treasure_guide.pdf
    • https://s3.amazonaws.com/tobojelusiwi/direct_and_indirect_speech_worksheet_grade_6.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bea8.bin
a536aeae6b41fe1d4da7fd59147f28f201eed6d08b75a34cfefd49e3ca729ff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA8 6228 bytes
font_01_sfnt_off0000d3d6.bin
bbe5548cf0ca56e0095a17903e76f716e33a81d3b04e2784684408b4ca71f01e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D6 10176 bytes

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