Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf4fffc11d511a5c…

MALICIOUS

PDF

78.9 KB Created: 2021-03-14 03:48:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfd6fd9a659f90a44eacfc3626571083 SHA-1: 6f4872551dd7571b85d4eb820e6f049101e51371 SHA-256: bf4fffc11d511a5c6a48f99fd7cb1f517d69f1c19b94457564c5ae3fa9673df5
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a malicious domain, likely serving a phishing or malware payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain metadata related to the lure, suggesting it's part of a phishing campaign.

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://jumiwimov.ru/wix?keyword=lavaloon+th9+army+composition+2020
    • http://tiboxul.iblogger.org/41465394021.pdf
    • https://cdn.sqhk.co/vorebilifi/yjifidq/mujofevojurazuwudomivu.pdf
    • http://gufutaca3.xyz/altistart_48_fault_codes_ocf8y74q.pdf
    • https://cdn.sqhk.co/petawelesup/dibJjdw/history_of_christianity_in_nigeria_book.pdf
    • http://itdiscounts.info/kenmore_elite_washer_and_dryer_size2b7en.pdf
    • https://cdn.sqhk.co/bofagenined/Rifidjf/kivudip.pdf
    • https://cdn.sqhk.co/ripalufix/gcjhiii/67099192407.pdf
    • https://cdn.sqhk.co/bareziwo/v6qghXw/nopaturoti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zotawof.rf.gd/76868380984.pdf
    • https://uploads.strikinglycdn.com/files/3255ae1b-729b-4359-9324-55505ff9f933/gufosoniratozi.pdf
    • http://xezujuwevan.epizy.com/97380087396.pdf
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_c1da36b9c9044d0fa20a2b14efe309fb.pdf?index=true
    • http://junopufobapepax.rf.gd/marshall_valvestate_2000_avt_150_review.pdf
    • https://uploads.strikinglycdn.com/files/783a657d-a3fb-4119-b973-1b501201b76d/what_are_the_elements_of_a_healthy_relationship.pdf
    • http://nivigiwaragere.epizy.com/destiny_2_guided_games_2019.pdf
    • http://vexukaxazixaxet.epizy.com/19037343483.pdf
    • http://xijidejejinenoz.rf.gd/playing_with_fire_imdb_parents_guide.pdf
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_a9f50e369783401b9ff30289ad407851.pdf?index=true
    • https://2a26c5f8-c4f8-4af8-830b-7e2c9961bd8e.filesusr.com/ugd/2e4362_e0e974ecedc24ff591c7e6bc4ddf9af5.pdf?index=true
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_342874fd1c084f12bfbb23935a3d7e04.pdf?index=true
    • https://uploads.strikinglycdn.com/files/551abfbb-e9f0-422d-93e3-0a39b8b48fb8/54145691745.pdf
    • http://jopinewo.epizy.com/wasipixudenar.pdf
    • https://uploads.strikinglycdn.com/files/58f23d49-87e3-4d9f-a4c2-a2f4e9c3ef26/cursos_de_ingles_en_linea_con_certificado.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb35.bin
c977cb382b6589b083bfd3f8c6745393751a86abc3bb12f737464dfba73f4abf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 5704 bytes
font_01_sfnt_off0000fe76.bin
84daf345e21b08075a6e329eeacb0a13a0447ddcc3efc64e98a9a4ab9c6a9d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE76 1936 bytes
font_02_sfnt_off000107b7.bin
e13478ea8789b9ef53dfe716406f4cdec13663d201b9ca80a264a539decbc76a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107B7 11092 bytes

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