Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9c980a1ff5d005…

MALICIOUS

PDF

62.1 KB Created: 2020-11-23 00:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 142bb187f76b5a3a474b7f119eaffdf0 SHA-1: 753bd6083ba53ca184fb2e4f8bfc81b2461d50fd SHA-256: 9b9c980a1ff5d0057f1ee65ea957a9f89c53642c7ea0b7e6297cc1946a5fe184
104 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, specifically flagged as a phishing trojan. The presence of an embedded URI pointing to 'trafftec.ru' suggests an attempt to redirect the user to a malicious site or download a payload. Although no scripts were explicitly extracted, the PDF structure and the ML detection indicate a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/123?utm_term=option+volatility+and+pricing+strategies+pdf+free
    • https://cdn-cms.f-static.net/uploads/4403959/normal_5f93e41baa4f7.pdf
    • https://musisemikalig.weebly.com/uploads/1/3/4/6/134694348/8627045.pdf
    • https://cdn-cms.f-static.net/uploads/4413703/normal_5fbae0cac5004.pdf
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f889a1c39b2d.pdf
    • https://fusopozosasotex.weebly.com/uploads/1/3/4/4/134477759/4842292.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/71ddee7e-c425-4856-9fdc-bd86c21a0e7f/sanazo.pdf
    • https://s3.amazonaws.com/kakekojezutok/48902965321.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/dimibupidosotem.pdf
    • https://s3.amazonaws.com/kasuwevovog/european_food_menu.pdf
    • https://uploads.strikinglycdn.com/files/a2367b41-d55f-41bb-925a-21cca21ce3e0/30984078414.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b54b.bin
4f2d3eb8aeb6adbb549a904e8e467a680cbf8dabe0b14023dfba2a83e206f0bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB54B 5512 bytes
font_01_sfnt_off0000c826.bin
378ee5bf43207e5f70a20925b3d142a55175e53520fb92977d9edb1433f296dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC826 10244 bytes

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