Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b99a100733d3379…

MALICIOUS

PDF

68.8 KB Created: 2020-12-18 10:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 202c5a72169c7c6e1c9de899942aa8c2 SHA-1: bd321a2142f1f328390424657436a7208c365720 SHA-256: 3b99a100733d33791875dc77fa2adf5e8c2f7d389921546fe0f144e381f74d56
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. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://traffset.ru/123?utm_term=laurel+mountain+elementary+school+austin+tx
    • https://manuxemewawi.weebly.com/uploads/1/3/4/4/134443751/3002495.pdf
    • https://static.s123-cdn-static.com/uploads/4486971/normal_5fc7ec0ea70c1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ditiruz/guymon_daily_herald_police_report.pdf
    • https://s3.amazonaws.com/pavujiniz/wobonelinas.pdf
    • https://uploads.strikinglycdn.com/files/a4bff4a3-1cf6-4de1-a378-efd4408ba460/astm_a530.pdf
    • https://s3.amazonaws.com/gebukil/7598182945.pdf
    • https://s3.amazonaws.com/kezemiradigu/metesudawejevofirevotes.pdf
    • https://s3.amazonaws.com/besafefaf/gaxaxatimogumemunebi.pdf
    • https://static1.squarespace.com/static/5fc0cbc7c6d964583621a279/t/5fc26ee1cb3e0f57719ea84c/1606577889542/brow_shape_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6a8.bin
6c9954682c2021e9ba675ccecf0ef2cfb52e54fc31c60d0785cb06a0aea8b6cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A8 5148 bytes
font_01_sfnt_off0000d808.bin
8956b87acb66c6a690a039629c87657f7e913a6a98a2e419ca4808029035e566		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD808 2112 bytes
font_02_sfnt_off0000e12a.bin
9a288cb83c39af841a6ea09d6255055cc270aab401b63455df3e6e78e55c846c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE12A 10920 bytes

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