Malicious PDF — malware analysis report

Static analysis result for SHA-256 279a338f7f209392…

MALICIOUS

PDF

64.3 KB Created: 2021-03-14 06:25:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ca136f26ab9af52358a1367bbc7ec05 SHA-1: 1ac30bee6e2bb06600c33d159ef0989128b27e51 SHA-256: 279a338f7f209392aaa03d9a51fc58989b1f707e422b2ad10adba8570ac78d44
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'botokaw.ru', which is likely a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious external resource, consistent with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=conjuguemos+ser+vs+estar%2523+3+answers
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/1427494.pdf
    • https://cdn.sqhk.co/bapisolel/Rrhdiaz/my_life_handheld_game.pdf
    • http://yildirimotobursa.com/56892919676ef8hm.pdf
    • http://bumumapa.mypressonline.com/secured_and_unsecured_loans.pdf
    • https://cdn.sqhk.co/vuvesanap/bdReWXo/fenizosubafolopeti.pdf
    • https://cdn.sqhk.co/dunokufimove/jdjjn66/tremolo_harmonica_sheet_music.pdf
    • http://1freedom.space/petavobasaninakim9jy4c.pdf
    • https://kimakinogi.weebly.com/uploads/1/3/0/7/130775446/30b848fe85e439d.pdf
    • http://whitecheat.xyz/chery_arrizo_5_manualm4h59.pdf
    • http://kersita.fun/ps_vita_firmware_release_datesl5ofu.pdf
    • https://bevikafu.weebly.com/uploads/1/3/4/7/134710030/9140326.pdf
    • https://cdn.sqhk.co/kinanekoxo/cidjjih/21019259405.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pixafur.atwebpages.com/dinamicas_de_grupo_rompe_hielo_presentacion.pdf
    • https://uploads.strikinglycdn.com/files/3e070bb3-80df-4723-9e8e-61f7753a2de0/knights_move_thinking_psychiatry.pdf
    • https://uploads.strikinglycdn.com/files/35e75b22-c0df-4e21-b00c-729bb2c827b8/adaptive_features_of_fish.pdf
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_466b928f30a84a799b477e5b2ec5aff6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/35c80cab-c917-4dd9-8762-c7162041ada5/gonuropa.pdf
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_e22fd9742d9049eab53e055133b2982b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/af5de5df-8649-426e-827d-dc5671095152/how_to_program_a_universal_remote_magnavox.pdf
    • https://uploads.strikinglycdn.com/files/3b4fe100-12f5-4a99-ab03-7c492aa37c64/stick_fight_shadow_warrior_red_belt_pattern.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_off0000c23a.bin
f09041ea24ca398ca5cd14500c6abecefb444119c7f12bb2dfae9005a5915323		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC23A 5016 bytes
font_01_sfnt_off0000d33b.bin
c3e39d504a2606d427a4e5ae4f4b9724d14fc055767f0f30e9c7136324069c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD33B 10096 bytes

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