Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3b8febdd2c7c42…

MALICIOUS

PDF

77.8 KB Created: 2021-04-05 18:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c57561a7603f6e6121db0f5543abbcbf SHA-1: 5a757c2609b9d0cccd434be5ab0238650ecb6025 SHA-256: dd3b8febdd2c7c426ac4f9cee06d543ab71f81080033db784912c69c5a691539
96 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, one of which is highlighted by heuristics as an external URI. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically a phishing trojan. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=snowflake+data+warehouse+architecture+pdf
    • http://zokixofevuku.22web.org/after_effect_project_logo_free.pdf
    • https://cdn.sqhk.co/legezuseg/micdhfc/33196554679.pdf
    • https://cdn.sqhk.co/mikitikotak/ghZQChg/7570485170.pdf
    • http://damita.fun/6380632103xznok.pdf
    • http://gavixed.iblogger.org/42438654870.pdf
    • http://istra-backwater.ru/27872951059a9xg0.pdf
    • https://cdn.sqhk.co/zidulibu/gOtr6B6/duwamizagip.pdf
    • http://kokolonesafu.getenjoyment.net/30959699917.pdf
    • http://meetsucre.pro/camped_rini_piano_sheet34end.pdf
    • https://cdn.sqhk.co/natefisaka/cQmghha/word_connect_game_download_uptodown.pdf
    • http://blockhcain.host/why_is_my_canon_printer_not_printing_magentak7rdn.pdf
    • http://sberbank.services/agni_5_missile_videozp4p0.pdf
    • http://gratoramaa.website/minecraft_1._14._4_optifine_forgekmzfe.pdf
    • https://cdn.sqhk.co/kitijorawul/7Ddij6k/panuxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gumetipazotepeb.rf.gd/gariwonu.pdf
    • https://uploads.strikinglycdn.com/files/c15223d6-1068-4cb1-9370-0ce9679154b7/download_juz_30_metode_ummi_anak.pdf
    • http://kexomuradalo.rf.gd/zajuxivunawafeku.pdf
    • https://uploads.strikinglycdn.com/files/8805b08c-b000-411f-81a4-1d5970406446/what_is_project_zorgo_leader_name.pdf
    • https://uploads.strikinglycdn.com/files/12dba939-b690-4dab-bde9-1c22f8484c1c/benagilow.pdf
    • https://uploads.strikinglycdn.com/files/a6a2757e-9d6c-47c4-950c-a088111f76a4/how_do_i_get_my_learners_permit_in_mississippi.pdf
    • https://uploads.strikinglycdn.com/files/6c1a7507-bdb6-49bd-9082-2247af66021f/psalm_23_3_commentary.pdf
    • http://jujuletofu.onlinewebshop.net/velocity_vs_time_graph_simulator.pdf
    • http://sujunutab.atwebpages.com/15187640717.pdf
    • http://vegunag.rf.gd/adherence_to_formal_rules_crossword.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_off0000f0b8.bin
59563801f20aa49deb87950e6d489e0c9b5f2d921253444d38c104e182f59e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B8 5500 bytes
font_01_sfnt_off0001037e.bin
156fec1225d181288f37e449c2a74ccfd7142608e34ec3a15b4500b864e9c781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1037E 10652 bytes

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