Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e0c9ff6fdad343…

MALICIOUS

PDF

78.5 KB Created: 2021-03-22 17:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92c072e1ce7b351a8b06f0c5157fa49f SHA-1: 505d0be14103dd5fa91b4c35d34e137985d6f349 SHA-256: 97e0c9ff6fdad3434225521b100b78ceb85322c47a527f81c88930dcc8ab8690
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to 'dafemum.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'coloring sheet'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/123?utm_term=lower+case+letter+a+coloring+sheet
    • https://cdn-cms.f-static.net/uploads/4444622/normal_604ccd993905e.pdf
    • https://cdn-cms.f-static.net/uploads/4463559/normal_6039f7c2a9407.pdf
    • https://static.s123-cdn-static.com/uploads/4419193/normal_5ffacece8628d.pdf
    • https://cdn-cms.f-static.net/uploads/4502721/normal_5fe8b2dc0919b.pdf
    • https://cdn-cms.f-static.net/uploads/4383913/normal_5fda15411a079.pdf
    • https://static.s123-cdn-static.com/uploads/4443574/normal_600736d029c0c.pdf
    • https://static.s123-cdn-static.com/uploads/4497646/normal_5fe3de8137562.pdf
    • https://static.s123-cdn-static.com/uploads/4374024/normal_5fca2e20cdad6.pdf
    • https://static.s123-cdn-static.com/uploads/4381105/normal_5fc63236a14bc.pdf
    • http://lafowesezojo.scienceontheweb.net/catalyst_3850_datasheet.pdf
    • https://static.s123-cdn-static.com/uploads/4371788/normal_5fec4b1ab405d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1f35e7bb-68c1-4ece-ade6-477070d8d164/how_to_describe_a_poems_rhythm.pdf
    • https://uploads.strikinglycdn.com/files/a9e2f953-130b-46ab-9839-f0974c1d6049/bodas_de_sangre_english_act_3.pdf
    • http://mukanebesiva.atwebpages.com/20917695569.pdf
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_7e89e25f1b4c427e8ad51fa974c02f3e.pdf?index=true
    • http://sekuwomexapa.myartsonline.com/howls_moving_castle_book_barnes_and_noble.pdf
    • http://dirazonun.myartsonline.com/62875026952.pdf
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_efaa68201c3b4b069dd3d1eb5a1114a8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3dcd6a8c-6a7d-453a-9f5b-3c80c578be25/64020085502.pdf
    • https://uploads.strikinglycdn.com/files/5677be82-7dce-4af8-a061-0fe23e3a2475/kamapa.pdf
    • https://uploads.strikinglycdn.com/files/bb9fe8c0-87a8-46a9-a315-8518a09e15cc/98053674699.pdf
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_c1a257ee97134666b0c61e02556b330d.pdf?index=true
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_3a61ee18eeb84ed38b8e13915868a543.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f5.bin
9815a763e6ec80eb086efe5b4d2372c7dafea43b57e78ade33ba919a9070ee2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 5096 bytes
font_01_sfnt_off0000fa4f.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4F 1800 bytes
font_02_sfnt_off000102dd.bin
9aea234ba1b297c63262bae87cd1e26a8c52000b09e8716a88bec4c4240dc7f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102DD 11516 bytes

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