Malicious PDF — malware analysis report

Static analysis result for SHA-256 de741f163df4ea99…

MALICIOUS

PDF

84.3 KB Created: 2020-12-23 08:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e63a897a5d8b1052364cde250265c4d SHA-1: d1e4a916ca9eff77ef524aa7c52755d2c71378fd SHA-256: de741f163df4ea995231366b5be16d7ccc1b0e74c2e047bdba0996ea55feefb9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a domain associated with malicious activity. The document body, though heavily obfuscated, suggests a lure related to marketing courses, aligning with phishing tactics. ClamAV and ML classifiers confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?utm_term=social+media+marketing+courses+with+certificates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6381781a-04fa-4c25-b835-1bd2db05c1c8/75747464938.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf510b173fb5383b98ed27/1606373646161/vec_fc_21.pdf
    • https://s3.amazonaws.com/vososasoxumete/zonulutipawobe.pdf
    • https://static1.squarespace.com/static/5fc392da27a199023ac63631/t/5fc8500a8eecd53e39e66331/1606963210710/40098353820.pdf
    • https://static1.squarespace.com/static/5fc67aea084698658e84b086/t/5fc8f7ea4fb67167f68f0606/1607006186152/kreg_k4_pocket_hole_jig_home_depot.pdf
    • https://uploads.strikinglycdn.com/files/5de199ee-489b-4b50-90dc-e1d51dc1adcd/jeketimajepumubuzaguti.pdf
    • https://static1.squarespace.com/static/5fc528f2abaecd33183df1a5/t/5fc94848e2ef1101968355a7/1607026769603/telefodisifipud.pdf
    • https://static1.squarespace.com/static/5fdd486d1091525336533171/t/5fdd5f6ef11f517dbbad5880/1608343407232/1646758959.pdf
    • https://uploads.strikinglycdn.com/files/7764ba03-3897-4032-ae03-5fe21c50ce83/stickify_stickers_for_whatsapp_download.pdf
    • https://uploads.strikinglycdn.com/files/bb096909-d242-498c-a423-8cbd9bbfc6d2/holy_paladin_best_in_slot.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf354a97599144ebcd859/1606284117665/19078508667.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_off00010b80.bin
cf237f729bb410d09257712a95f04a4efca1c9e4e5c490a8b270949b3c186360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B80 5696 bytes
font_01_sfnt_off00011eca.bin
8c41b3ecb22cb80aba7ee6ad4d10c24670c0bb887b7539d43f3b9447ce920dc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECA 11012 bytes

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