Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2c9d137415fbb2…

MALICIOUS

PDF

81.5 KB Created: 2021-03-24 19:36:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f2e826199df93a0a35c2e5e73a698a6 SHA-1: 1b69060fd967dd678239bf5a6ba3b5ae8c4b7f41 SHA-256: 9c2c9d137415fbb2953db38c566c5a4025701b7f02d30459d6b1735c64b4faee
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 high risk score. It contains an external URI pointing to 'ponafet.ru', which is likely part of a phishing campaign disguised as a professional tax form. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the presence of external URLs and the overall detection indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/123?utm_term=cerfa+taxe+formation+professionnelle
    • http://subfamjtii.site/video_editor_online_free_for_youtubehk0t5.pdf
    • http://yewes.space/605612885913ftb1.pdf
    • https://cdn-cms.f-static.net/uploads/4458161/normal_605857e9252ec.pdf
    • http://straponartist.com/2277945633r9w78.pdf
    • http://scarcebook.com/xitedokm7t5.pdf
    • http://skidki-day.shop/systemverilog_for_verificationyy1ll.pdf
    • http://helpverifybadges.com/21603666540h6spl.pdf
    • http://1xbets-regs.site/xopigetomemunoxatokuvmuppo.pdf
    • https://static.s123-cdn-static.com/uploads/4387586/normal_5ffbc3b0178ca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8bd96ba5-e6ee-4dd6-9d99-850b28c76243/folisugidevagok.pdf
    • https://uploads.strikinglycdn.com/files/bef5bfa4-4f81-4c3b-a4d2-92faaba99e75/pazukivubiwokumofijudeb.pdf
    • https://uploads.strikinglycdn.com/files/e0fbca7e-228f-41a0-a461-970de65b54aa/wordly_wise_3000_book_6_answer.pdf
    • https://uploads.strikinglycdn.com/files/0a30b2bb-4a72-429f-948c-83629556e26b/kaxokupenumatatojuduju.pdf
    • https://uploads.strikinglycdn.com/files/ac6590cf-cbcc-4c28-878d-9c7ad1b722d8/how_old_are_the_main_characters_in_pokemon_sword_and_shield.pdf
    • https://uploads.strikinglycdn.com/files/30c51af5-c6d1-4d7b-8504-6bd57068cb2d/intermatic_outdoor_timer_switch.pdf
    • https://uploads.strikinglycdn.com/files/4e124717-3c10-41bc-8a70-17b821de1daf/coast_guard_physical_security_and_force_protection_manual.pdf
    • https://uploads.strikinglycdn.com/files/d11a4d94-19d2-4666-874b-35597086a93c/samsung_appliance_repair_near_me.pdf
    • https://uploads.strikinglycdn.com/files/367087ac-d492-475e-bab0-17d3d83b1727/12790337758.pdf
    • https://uploads.strikinglycdn.com/files/9be03abc-c65d-4445-bc66-874a6d01e1e8/95921409050.pdf
    • https://uploads.strikinglycdn.com/files/14304186-9b5c-4dec-92ec-4ee118b70375/97392788769.pdf
    • https://uploads.strikinglycdn.com/files/c6f8649d-f410-46e0-b454-55c0ae32d9bf/weight_watchers_calculator_reset_instructions.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_off0000fdc4.bin
56685963a6eda94ad253d53403f89a4d67faf789f11b350aca7406dc83fd5cd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC4 5020 bytes
font_01_sfnt_off00010ec0.bin
aeaeffdc21f5521501532db361d4ad111b4be1eaa6598dbf370eaf15d980f7c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC0 12396 bytes

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