Malicious PDF — malware analysis report

Static analysis result for SHA-256 19fe667a29958734…

MALICIOUS

PDF

68.0 KB Created: 2020-12-22 20:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 209bc6711c9cbd18cbf41eb686291c36 SHA-1: 84e8f1c67641a55e73fdc5ba92aa1c028704a457 SHA-256: 19fe667a2995873443535061f081d88e539111113727b727fd617cf8a4d0f55d
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains an embedded URL pointing to 'trafffi.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically and potentially used as 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://trafffi.ru/123?utm_term=happy+anniversary+sister+meme PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476437/normal_5fb2d61658648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5fdc0936cd368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384045/normal_5fb3ea3716c84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450353/normal_5fdcf775f0588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416802/normal_5fa3042aa7d35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373986/normal_5f8c841edabd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_5fd2c826c2856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/subud/14533023606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2af1198-8bcc-4f85-8dbf-9c138ed47b36/58277899558.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/icao_safety_management_system_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/43217727361.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C7 4736 bytes
SHA-256: dbacfe12773b1c9092e7e289fe1a1b872c67da3b95bd526a97928cbf8b41f1d7
font_01_sfnt_off0000d3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B4 9804 bytes
SHA-256: 8fe56a17abff2b739c094f565b0aebfeb9d5d4cc387d760bea5956bd7f304767
font_02_sfnt_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71