Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa3cb6d3d24b47e…

MALICIOUS

PDF

63.7 KB Created: 2020-11-28 09:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d3b6d7c2e21f9fbd53621d6492a42a46 SHA-1: 1e58ddd24be813bf85708d7001bd395a1a0b4d2b SHA-256: baa3cb6d3d24b47e6ea3c6d0ba1a5636bebe729a08bfd2b7fca497e92c83fa9f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, trafffe.ru, which is likely used for phishing or to serve a secondary payload. The PDF structure and embedded content suggest an attempt to disguise malicious activity, potentially involving JavaScript, to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/aws?utm_term=escala+braden+q+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5fa472fe2e026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485305/normal_5fb4bbdcb8643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452376/normal_5fa21764175fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403952/normal_5f9f78a01da15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5fae59b480fa7.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/6d7938ff-a656-4508-8c41-4c5b813028e5/bowflex_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e54b92-2de1-4b09-a937-6e1de7664af7/pabucumun_ajan_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f14fe583-5212-4450-aa93-f15827d21a08/67811903862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e21843f-6094-4c88-afc5-ef1992d6ff80/nlt_bible_file.pdfIn PDF document text
    • https://s3.amazonaws.com/digigitusuduk/justin_bieber_lonely.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/geridefudosorifiwevezavek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e59c92a3-5adf-4fd7-8108-330680f32c56/6135983154.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_off0000b969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB969 5372 bytes
SHA-256: 72efb6bb9e59bfbf9f52feb66970152dda4d983954b7fa81424e1baccf3bcee3
font_01_sfnt_off0000cbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB2 11292 bytes
SHA-256: 254b6773a2562ef7ecbbeff7251b73a0b7501bfbcab4d42208d2273f7d469894