Malicious PDF — malware analysis report

Static analysis result for SHA-256 a942802d967701d0…

MALICIOUS

PDF

70.2 KB Created: 2020-12-25 02:14:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5bbcc3cfe6cdf5e821319bbd8e656cf SHA-1: b5595d222b82fa22d7ff68bf4ebf0f242e6dad44 SHA-256: a942802d967701d09b9b649aa792b1b1a85835bebcbe05b53ff16e4a0c751c52
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'traffset.ru', which is likely used to host a malicious payload or redirect to a phishing site. The PDF structure itself is also flagged for suspicious object duplication, indicating potential obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://traffset.ru/aws?utm_term=inventory+turnover+account+on+balance+sheet
    • https://cdn-cms.f-static.net/uploads/4380540/normal_5fa02cf99e392.pdf
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/7814856.pdf
    • https://cdn-cms.f-static.net/uploads/4452389/normal_5fd63f7a4f70c.pdf
    • https://cdn.sqhk.co/zikegasenar/SZPoKQx/offline_voice_access_apkpure.pdf
    • https://cdn.sqhk.co/soxemudu/Ahb98kg/92241464540.pdf
    • https://static.s123-cdn-static.com/uploads/4471988/normal_5fcea10727574.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d376e3ce-2d65-4d12-8d15-e898884197df/felanugunafobovalujukepup.pdf
    • https://uploads.strikinglycdn.com/files/ed2a9b43-1216-41b8-9041-0f40e4abc1c8/propaganda_used_in_brave_new_world.pdf
    • https://uploads.strikinglycdn.com/files/ac11b3b6-8db3-4607-b2cb-677ac98623fc/13756185069.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_off0000d8c0.bin
08853df8b2395af4c58d4281815c20731f20c75b8c585045f4c0f295d1f2ef64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C0 5124 bytes
font_01_sfnt_off0000ea32.bin
9fbc872a9cae9472ffb675f3f4416439eb18770807a3b97c9e9267905ee84eea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA32 10072 bytes

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