Malicious PDF — malware analysis report

Static analysis result for SHA-256 37dc0ed5cf2459fc…

MALICIOUS

PDF

65.8 KB Created: 2020-11-23 06:20:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb0817b70140d773fb2b83c22838144f SHA-1: 12df3f0dd5a6384e317950e14a8652c35c310230 SHA-256: 37dc0ed5cf2459fc2b62e4b2da543618fb5d39cc6334603bc0dbda3cdb47695e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffine.ru', which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains references to 'Pro blast xl' and 'wkhtmltopdf', suggesting a lure related to a product or service.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=pro+blast+xl+does+it+work
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/6516439.pdf
    • https://vodemiteju.weebly.com/uploads/1/3/4/7/134722100/zelexojojufaforop.pdf
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f96875aeeeaf.pdf
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f92f96f9ea4d.pdf
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/pabovi.pdf
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdf
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5fb371174ed84.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b6689cf6-93fb-4617-bed1-58ae04a4e106/lovixonuvivanowolap.pdf
    • https://s3.amazonaws.com/dovulavavo/poxanifudabipefij.pdf
    • https://uploads.strikinglycdn.com/files/3b3f4ec1-dbe6-4951-898e-4fe5a99cf1c6/59934337075.pdf
    • https://s3.amazonaws.com/sefabe/android_game_development_tools_free.pdf
    • https://s3.amazonaws.com/xifabilejilab/43550436931.pdf
    • https://uploads.strikinglycdn.com/files/10eb788a-a03d-4bd1-9532-db222df78fe3/nutrition_information_carrot_cake_slice.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_off0000c802.bin
2b42084780bd953e35f49d3ea798f273924e1ab7ba8f32b358fb53c7063f2c64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC802 5184 bytes
font_01_sfnt_off0000d9c0.bin
fbcb6e7cc6f10f81eefa1369ed9d02e4ecc2522c69005b7d1274e97880eccc8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C0 9672 bytes

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