Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b36beb8bd2f0e52…

MALICIOUS

PDF

72.5 KB Created: 2021-04-01 08:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62331659b71821c47248084714044450 SHA-1: d0e2c110278de025be8aa53464c1e6a6ee74f62c SHA-256: 3b36beb8bd2f0e52caeb0cd1be51d72f97e6f7e2f3d6bc36a50371f7cb345b94
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'https://ponafet.ru/award?keyword=active+and+passive+voice+exercises+all+tenses+pdf', which is likely a phishing lure or a distribution point for further malicious content. No scripts were extracted, but the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://ponafet.ru/award?keyword=active+and+passive+voice+exercises+all+tenses+pdf
    • https://cdn.sqhk.co/zolewiko/huihejj/asteroid_2019_ok.pdf
    • https://cdn.sqhk.co/faroziwe/jpjh3jj/depression_glitch_aesthetic_wallpaper.pdf
    • https://cdn.sqhk.co/jizapamilizo/SEiahgm/shelter_cove_campground_phone_number.pdf
    • https://cdn.sqhk.co/bulegumu/hMQqk0S/angelus_paint_jordan_11.pdf
    • https://cdn.sqhk.co/vozeseseber/h1cTs44/video_poker_machines_for_sale_ohio.pdf
    • http://bizifawidipegib.iblogger.org/annotated_bibliography_guidelines.pdf
    • https://cdn.sqhk.co/sebutarukaw/hgchaBx/dimenezupaku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zazelujeju/duxakaxabelex.pdf
    • https://uploads.strikinglycdn.com/files/86b56ca7-38b1-4be6-83f1-02b13bfee0ca/36340794411.pdf
    • https://s3.amazonaws.com/julexekubaj/algebra_simple_equations_worksheets.pdf
    • https://s3.amazonaws.com/jidosatikim/buzosapemuwununufogado.pdf
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_a43e56dfc1f54c0d82e97072ad0de778.pdf?index=true
    • http://misibinebob.epizy.com/bosch_washing_machine_parts_manual.pdf
    • http://foxadawimuwewar.epizy.com/define_quantum_according_to_chemistry.pdf
    • http://dujazenemelix.epizy.com/aprendizaje_social_y_emocional.pdf
    • https://uploads.strikinglycdn.com/files/42741897-7d4a-4b65-9cb9-96fc9553b7f6/61163179279.pdf
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_9177b39d4742482993371ebd2aa1afab.pdf?index=true
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_3c06861c810546cca0828fdd09bd7b06.pdf?index=true
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_93f025a69b2c41bdac52cdd036928d02.pdf?index=true
    • https://s3.amazonaws.com/mexavofezoxi/nilugejukujiwodepuf.pdf
    • http://pidaxodudu.rf.gd/zoxuk.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_off0000de5e.bin
531bfee4a81c63dc52968d26f1bf0430da270b3829004d5afc7b07ad0c72bf16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5E 5268 bytes
font_01_sfnt_off0000f066.bin
f4a3f9635fa418d4519a0537f2e1f015183c461ddd3663d15a2baeaef6a91aff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 10532 bytes

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