Malicious PDF — malware analysis report

Static analysis result for SHA-256 f509cba832ebee15…

MALICIOUS

PDF

69.4 KB Created: 2020-12-19 13:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fec9f3bf7915f3603a842ad98e23e22e SHA-1: d1d43d3e64771c816e3bf7249e448e58041b6648 SHA-256: f509cba832ebee15960a2fb10a9eba0821c3ce5bece2d6c56eac8a448a9006e4
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to a suspicious domain, traffnew.ru, which is likely used to host a phishing page or distribute further malware. The PDF structure itself shows signs of manipulation, including duplicate object definitions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffnew.ru/strik?utm_term=only+daughter+sandra+cisneros+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457311/normal_5fa760f18d177.pdfIn PDF document text
    • https://dozogifelezu.weebly.com/uploads/1/3/4/3/134313369/3413644.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387932/normal_5fcbe6caa325d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_5fbfd0bec809f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5fd27a7bc6274.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/sesijesule/55190308972.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/breaking_into_wall_street_technical_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd06e9ec0a1d2b4e570ad9/1606223593876/16434946520.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbf0116eb00e3c4bba69/t/5fcf5a2f05f6f27807584da7/1607424562080/titowikubivivagovedano.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52be63398ff751549a8ba/t/5fc7a8859dfc2a4045274f1f/1606920326446/julutapuledavevujude.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_off0000c630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC630 5304 bytes
SHA-256: 799cfeb4a48ec411d2019e898a9c77c75205c145ebd3ee33706b01f9f49d2924
font_01_sfnt_off0000d848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD848 10032 bytes
SHA-256: dc7a1c44fc95eaaa01047d2645244a2de7cd4beae7d98d44843fa254d3082ad4
font_02_sfnt_off0000faa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230