Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de8c212d33c4565…

MALICIOUS

PDF

74.6 KB Created: 2021-03-26 13:09:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49aa83f3b280f0642636bd6ff30b2a71 SHA-1: d0816637600fc4b86ceacb76729ef3a065f80e42 SHA-256: 2de8c212d33c4565c107464889ae6ddc89202f4ab852cb2f35f5d8d5f270756b
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'dafemum.ru', which is likely used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dafemum.ru/123?utm_term=archero+guide+talents
    • https://cdn-cms.f-static.net/uploads/4482215/normal_603b69871a480.pdf
    • https://cdn-cms.f-static.net/uploads/4470678/normal_602179882543e.pdf
    • https://static.s123-cdn-static.com/uploads/4446782/normal_5fc960ff28cf9.pdf
    • https://cdn-cms.f-static.net/uploads/4499351/normal_604506aa95951.pdf
    • https://cdn-cms.f-static.net/uploads/4462727/normal_60438fd884cf4.pdf
    • https://cdn.sqhk.co/wuluzajiroz/zifhjhc/gdpr_legitimate_interest_assessment_template.pdf
    • http://kunutudusoxa.mywebcommunity.org/the_knight_s_tale_analysis.pdf
    • http://gemajelibetojup.scienceontheweb.net/how_to_study_idioms_and_phrases.pdf
    • https://cdn-cms.f-static.net/uploads/4365591/normal_604028a95ec46.pdf
    • https://cdn.sqhk.co/naliwanik/Xibiejb/galaxy_attack_alien_shooter_pc_download.pdf
    • https://cdn-cms.f-static.net/uploads/4368246/normal_60232bc07c013.pdf
    • https://cdn-cms.f-static.net/uploads/4391920/normal_6041ba25568fd.pdf
    • https://cdn-cms.f-static.net/uploads/4480745/normal_603029684be86.pdf
    • http://wativeb.mypressonline.com/1193320100.pdf
    • http://mazikopipovix.mywebcommunity.org/characteristics_of_a_good_project_proposal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f3cc9e55-a6ba-433a-8a89-36a4c084e544/serez.pdf
    • https://uploads.strikinglycdn.com/files/055e9f3e-77a7-4214-9501-43ed45d19597/are_microwave_drawers_worth_it.pdf
    • https://uploads.strikinglycdn.com/files/b6a84e48-6b55-4777-9f4a-08e7d72b1e42/canon_t4i_specs.pdf
    • https://uploads.strikinglycdn.com/files/c1be74bf-c783-4fc5-b8ff-e851c51954d4/212_the_extra_degree_powerpoint.pdf
    • https://uploads.strikinglycdn.com/files/4f2bb38c-feaf-4b4f-baf0-960cc3627fb3/33108429148.pdf
    • http://gozidonozali.myartsonline.com/afcat_question_papers.pdf
    • https://uploads.strikinglycdn.com/files/7f265621-d001-44b8-a33d-e1736fd2fefc/melugorebudavip.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_off0000e7a3.bin
c7307811bc0492274bc5c88bd2484b3b66a3990d27cc321afb09f8927ddc8a48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A3 5192 bytes
font_01_sfnt_off0000f942.bin
4f9f0df177ce5ba683464f95d5e7c1e9b8bf95587f564c376521194da83976ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 10492 bytes

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