Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b975e08c03a5425…

MALICIOUS

PDF

83.3 KB Created: 2021-03-14 03:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1207e0c7d3224536daa55ac0e2ccf27c SHA-1: 589c57b8ec734cee0b8a7ae4a1529551749bf98a SHA-256: 3b975e08c03a54253ac5e94be81c10132eb1f56a228aa66ec44de3d3ccf1dafb
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, with a specific detection name indicating it's a phishing trojan. The embedded URL points to a domain that appears to be a lure, disguised as a search result for an academic topic. No scripts were extracted, but the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/award?keyword=faraday+s+law+of+electrolysis+pdf
    • https://cdn.sqhk.co/saxamabewido/ifsFgez/asca_school_counselor_interview_questions_and_answers.pdf
    • https://cdn.sqhk.co/kusedesomawa/gg9KwqX/77689972158.pdf
    • http://converstarget.ru/viewsonic_projector_pj551d_manual2bytz.pdf
    • https://cdn.sqhk.co/rotogogoji/ugf1ib7/9634301742.pdf
    • https://cdn.sqhk.co/leredupodeka/ihzHggJ/dual_monitor_stand_32_inch.pdf
    • https://cdn.sqhk.co/naludibeg/fYjebYf/23022237423.pdf
    • https://cdn.sqhk.co/woxiwovar/0iacjib/amazing_labyrinth_game_directions.pdf
    • http://verifybadgehelp.com/breakfast_club_soundtrack16oac.pdf
    • https://static.s123-cdn-static.com/uploads/4446770/normal_5fe0b4d7d6429.pdf
    • https://cdn-cms.f-static.net/uploads/4503787/normal_602e38c54781a.pdf
    • https://cdn-cms.f-static.net/uploads/4484805/normal_60493ec737118.pdf
    • https://cdn-cms.f-static.net/uploads/4471688/normal_6017b5b6306f7.pdf
    • https://static.s123-cdn-static.com/uploads/4408583/normal_5fe3e278ae8f0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/094afb0b-da1e-495e-92ba-d395aec5be91/how_to_stop_sensor_light.pdf
    • https://uploads.strikinglycdn.com/files/bf1b3748-a92b-4727-85bb-11110ee3e30e/dorian_gray_sabrina_pimples.pdf
    • https://uploads.strikinglycdn.com/files/8f6583db-d446-42c0-9c27-756c19176ddb/91302599510.pdf
    • https://uploads.strikinglycdn.com/files/d9a18f66-04f9-472c-9285-486ecfd12199/best_comedy_books_for_adults.pdf
    • https://uploads.strikinglycdn.com/files/56bb907a-4072-4647-8d39-decd8cf79ac3/what_is_a_ps5_digital_edition_console.pdf
    • https://uploads.strikinglycdn.com/files/59ddd109-d87a-424f-bafb-afa7cba7dd73/moxuwovumumebexibixovar.pdf
    • https://uploads.strikinglycdn.com/files/ac099afa-9bfe-4975-b2c6-4e20d0e24f59/how_to_become_a_manager_at_chick_fil_a.pdf
    • https://uploads.strikinglycdn.com/files/8260959e-5ac5-40ce-a3de-ebced1ced96f/71840001634.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e36a.bin
a1a1225a4e59cb8a70feb71eb84497bdce71965f23a83102afe97727f1703162		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE36A 4980 bytes
font_01_sfnt_off0000f48a.bin
de288d5105e3d1eec481857516291169da814475e6ed54d586142cdc07901675		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 11196 bytes
font_02_sfnt_off00011b2d.bin
dfedb69b69b2b4a9aa5c70504f0f7dbeb0d440888129061ee651c089cd0ed7a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2D 16340 bytes
font_03_sfnt_off0001310f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1310F 4324 bytes

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