Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8454301dc11bc5…

MALICIOUS

PDF

168.0 KB Created: 2021-03-09 02:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f4d787fcd5d98df16f83db2f671d3a35 SHA-1: f552911b14b6a0eef6a34df1da56651326553487 SHA-256: fa8454301dc11bc5606f1e7d60b791364f77e9652fa68d429bca7c418c46bc17
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://vilenefex.ru/award?keyword=autonomous+vehicle+industry+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5feb68061bcf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_603002b2f033c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443624/normal_5fd2f880dfb61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5fe2365f5eef9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454995/normal_5ffa85bec632a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446388/normal_6024cb0a19f18.pdfIn PDF document text
    • https://dogigivemo.weebly.com/uploads/1/3/4/5/134515387/2a31c15f.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/lebevedika-pevafef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418184/normal_602cf62b92401.pdfIn PDF document text
    • http://wivevemeb.scienceontheweb.net/dimafege.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/linear_bearing_smith_machine_with_weight_stack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379045/normal_5fcd896dcbd87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vanatul/vinapi.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/86758699536.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/worupapibogorutebo.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/atwood_machine_lab_report_discussion.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/rig_veda_upakarma_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/61454838774.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/non_collusive_oligopoly_def.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_off00025b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25B89 5336 bytes
SHA-256: 1275137fe73bd39995234b9c73a35ea724f2353e2f7020934f5efc4fb6d4179c
font_01_sfnt_off00026d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26D97 10660 bytes
SHA-256: dd402881ff0faeb1c0eeb44a2a25858277a9abf6d7fdddff5d3c1b5e4e277fd9

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