Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4020ac032ca8e9…

MALICIOUS

PDF

72.8 KB Created: 2021-03-11 23:47:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d90c856efb82bf962af44b99df151593 SHA-1: d738f798e48a796d36848cab25b70685454ad02f SHA-256: 8f4020ac032ca8e98cca0d2d794b2ab1b537b26114ad8bf6fad88b0eaff90c44
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a URL that appears to be part of a phishing or malware distribution scheme, disguised with a lure related to a popular book. ClamAV and ML classifiers strongly indicate maliciousness, consistent with a phishing attempt to trick users into downloading further malicious content. No scripts were extracted, but the embedded URI is a primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/award?keyword=paulo+coelho+hippie+book+pdf
    • https://cdn.sqhk.co/vojazodelud/Khc0ii9/panoliw.pdf
    • http://semowatuk.iblogger.org/74987844433.pdf
    • https://selenaza.weebly.com/uploads/1/3/4/8/134878333/fb6100e8.pdf
    • https://cdn.sqhk.co/nixenexax/Vijg3Q6/badinegiwudozarafabeme.pdf
    • https://rejobasagiletez.weebly.com/uploads/1/3/4/6/134642313/3171881.pdf
    • https://misiwutikamiba.weebly.com/uploads/1/3/4/6/134601431/9381566.pdf
    • https://cdn.sqhk.co/minofavazu/Qheihib/buvop.pdf
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/petixixepivusagi.pdf
    • https://cdn.sqhk.co/weruvewo/shjgi66/lasership_delivery_truck.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9aa962f5-0833-4c53-8862-4181f3059fab/kenmore_ultra_wash_dishwasher_filter_location.pdf
    • http://putesedesupelo.epizy.com/gmat_preparation_software_free.pdf
    • https://s3.amazonaws.com/wupiwupiwot/44212693909.pdf
    • https://s3.amazonaws.com/fovezewi/47541720377.pdf
    • http://topuwagib.epizy.com/nulagubu.pdf
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_97d48757bd8e486db295765896239d7c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/06ce18c8-fdee-4da4-9c36-afb0310285f9/quadrafire_mt_vernon_thermostat_problems.pdf
    • https://uploads.strikinglycdn.com/files/fe03146d-258d-430a-b6af-ab54aa425fd8/stephen_king_next_book_2020.pdf
    • https://s3.amazonaws.com/gujutavevive/4139589298.pdf
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_3d8878517e5a41d485357cba85e844e5.pdf?index=true
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_63f149412e5d45a2aac8c399fd815edb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f54bf5be-8d54-49f7-b7e3-d66bed951826/how_to_pair_baby_monitor_motorola.pdf
    • https://uploads.strikinglycdn.com/files/9c7f9f56-e589-4d4c-b410-a3a21ff7fe2a/jisato.pdf
    • https://a819be37-316e-4347-83bc-b067fb6953c8.filesusr.com/ugd/d5662a_f0c4c9e304694441a3a5dadf3b5cb397.pdf?index=true
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_21b25cff9f8142cc94d96be7def02647.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d4.bin
f7f216cc31d80a897762dc9f01a28f703b57384be6f919d5c0755bc771957109		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D4 5172 bytes
font_01_sfnt_off0000f269.bin
fc5a67f3da92d321988b3ec3680025bc4a2af1a6bff81288abea89abd21cef14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF269 10324 bytes

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