Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ba8b6f26e684c1…

MALICIOUS

PDF

81.0 KB Created: 2021-05-13 06:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 528ded03eafd9729c2081527124c3120 SHA-1: f133990c1e14d5f9de3b8575ae843391d8f19de7 SHA-256: b4ba8b6f26e684c1b2ab7fb3ad2e52bf902aa02aaf93ffb59a0496cd48fa10d7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The document body, though heavily obfuscated, appears to be a lure related to bodybuilding course materials, aiming to trick users into visiting the malicious URL.

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://seumenha.ru/wb?keyword=charles%20atlas%20dynamic%20tension%20bodybuilding%20course%20pdf
    • http://vegofejolafud.mygamesonline.org/convert_file_to_jpg_file_online.pdf
    • https://cdn.sqhk.co/jomutepe/khaGYjg/wyze_discount_code_january_2020.pdf
    • https://cdn.sqhk.co/bawivurolut/IM8jhbw/pocket_door_handles_uk.pdf
    • https://cdn.sqhk.co/tirinakiweda/gdgfidm/jixunevu.pdf
    • http://lnstagramcopyrightmanagement.com/true_detective_season_1_episode_3_the_locked_room_script34nq1.pdf
    • http://ledy66.net/resume_menon_platono52tq.pdf
    • https://cdn.sqhk.co/wofetewa/Fjhiffq/directv_billing_dispute_phone_number.pdf
    • http://keysecret.ru/33228221941f5gck.pdf
    • http://onlinekartiadesi.com/83476840919qtegb.pdf
    • https://cdn.sqhk.co/fapulatonupe/tIhecid/angry_birds_space_hd_mod_apk_revdl.pdf
    • http://whysmall.space/covington_ky_police_reports2xs5w.pdf
    • https://cdn.sqhk.co/pasojixaju/Hii9hic/lozokimamilosajokes.pdf
    • http://kalidejomepajo.scienceontheweb.net/battle_angel_alita_2017.pdf
    • https://cdn.sqhk.co/kogewole/gjhhiic/99124069951.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0e1c9b30-967d-4099-9c76-78a8e7cb44da/making_a_leather_knife_sheath_patterns.pdf
    • https://uploads.strikinglycdn.com/files/e08fe733-2cad-4204-a318-af8c2d6d02d1/how_much_is_a_nintendo_ds_lite_worth_now.pdf
    • https://uploads.strikinglycdn.com/files/224a4203-8786-4410-8ad6-695dc4fb89df/41606950422.pdf
    • http://wuxosalilujaza.atwebpages.com/cg_police_si_syllabus.pdf
    • https://uploads.strikinglycdn.com/files/49eda82a-8b34-4f96-b933-6ce1d60f11ea/edexcel_a_level_biology_lab_book.pdf
    • https://uploads.strikinglycdn.com/files/112fe6ea-209d-4a40-98b9-9f6f6066e606/78744447757.pdf
    • https://uploads.strikinglycdn.com/files/cebae6dd-7432-46fb-9d2e-40b08b2c8caf/python_for_absolute_beginners_youtube.pdf
    • https://uploads.strikinglycdn.com/files/ff45f5c3-e3a5-410f-af62-b97ec0424b42/bissell_green_machine_manual.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_off0000fb93.bin
81b0f7a95889844cdd05d4ba46fd88fa9eb317dc2d0c4b47157fe3bf93d0241c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB93 5716 bytes
font_01_sfnt_off00010ed9.bin
3e6b3ecab7dca2694e65afb3830ea4e0e4b60820afb9c2ea8288ddca55719457		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED9 11552 bytes

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