Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7b3622dc8b6c6e…

MALICIOUS

PDF

71.2 KB Created: 2020-12-21 00:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd8e05c03338e9ca88616813b1823353 SHA-1: 7bbd8f6687afca1d051369fb338c7eec57c564fa SHA-256: 8e7b3622dc8b6c6efeec609ac4501adc1e933b02bf72ed8e4a4aa81bbbb19abe
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'traffking.ru', which is likely used for phishing or to download a secondary payload. The document body is heavily obfuscated, but the presence of the external URI and the high risk score indicate malicious intent.

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://traffking.ru/strik?utm_term=ghd+professional+air+elite+hair+dryer
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5fd8c40be449f.pdf
    • https://cdn-cms.f-static.net/uploads/4490920/normal_5fd2e0d1ce022.pdf
    • https://cdn-cms.f-static.net/uploads/4369922/normal_5f9878c3025c6.pdf
    • https://cdn-cms.f-static.net/uploads/4501509/normal_5fb6786248acb.pdf
    • https://static.s123-cdn-static.com/uploads/4482418/normal_5fc9f9504bb39.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc29253a3bf4b14abb3bccc/t/5fc8eab7153fcd789c394818/1607002810443/amazon._com_cyber_monday_code.pdf
    • https://uploads.strikinglycdn.com/files/83955b38-751a-484a-afa3-1a1d8f931187/14286599516.pdf
    • https://uploads.strikinglycdn.com/files/00f5a7ca-c86a-4aca-a854-f14cfb897292/79463471371.pdf
    • https://s3.amazonaws.com/liguwubore/60496499928.pdf
    • https://uploads.strikinglycdn.com/files/fecc6f20-01ea-4e79-9899-9f82caa800a8/35132706606.pdf
    • https://uploads.strikinglycdn.com/files/5943e374-18d7-4f9e-8a26-10121e182c13/sharp_er-a320_cash_register_master_reset.pdf
    • https://static1.squarespace.com/static/5fc5252cb8467722f1ef6e04/t/5fc9822f9309303fb82715a7/1607041583607/rock_guitar_intro_ringtone.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_off0000d8c1.bin
a46d797e177e9f21696e5a94c2bb167fb43963c35b8266037d322e8ffa023cd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 5260 bytes
font_01_sfnt_off0000eaab.bin
515a80d4f4680405963af9396532bdb42daffc5f60bdec567da562c8c75036b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 10996 bytes

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