Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa6d997fc0849ef…

MALICIOUS

PDF

68.6 KB Created: 2021-03-25 00:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 304b51dc11f72caf6633f0071a28e440 SHA-1: e03b01714ffe92c8d2d24139d8bd2398f277d094 SHA-256: 4aa6d997fc0849eff6a5ad770a2f316482909be45cd37437038f275921e3457a
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'kuzutuzo.ru', which is likely used to deliver a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a menu, aligning with phishing or social engineering tactics.

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://kuzutuzo.ru/strik?utm_term=jerry+bob%2527s+valencia+tucson+menu
    • https://cdn.sqhk.co/zovitamojim/eiyQje6/wize_eyes_near_me.pdf
    • http://novuzigekisev.iblogger.org/rovokatimerofidazimami.pdf
    • https://cdn.sqhk.co/rigizisojix/gQO6q2Y/coliform_bacteria_in_water_and_pregnancy.pdf
    • https://cdn.sqhk.co/kovezozeseg/cjgNgj8/retofokanaxotometidawixe.pdf
    • https://cdn-cms.f-static.net/uploads/4412382/normal_5fd1e7789c0da.pdf
    • https://cdn.sqhk.co/naziwixolagu/X8ge1bh/tijunufamoxewobadum.pdf
    • https://cdn-cms.f-static.net/uploads/4413973/normal_60154a0538c43.pdf
    • https://cdn.sqhk.co/vilubofi/eRjidJV/tank_on_tank_game.pdf
    • https://cdn.sqhk.co/rekosiseweno/bigHLhh/gosowa.pdf
    • https://cdn.sqhk.co/jedepazisu/ggjiPSO/zombie_sniper_shooter_mod_apk_download.pdf
    • https://static.s123-cdn-static.com/uploads/4469860/normal_5ffe017e2067a.pdf
    • http://revukajazoweku.22web.org/atheros_client_installation_program_windows_xp.pdf
    • https://cdn.sqhk.co/mimofeto/ahaajbV/30510749845.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rozosijamuruxo.rf.gd/capital_bra_berlin_lebt_2_free.pdf
    • https://uploads.strikinglycdn.com/files/b4a29c9f-8219-4441-8009-95b9507a9ed9/vaxodelepu.pdf
    • https://uploads.strikinglycdn.com/files/76c394e7-a06a-4b51-beee-b59f4f6a95a9/35723895782.pdf
    • https://uploads.strikinglycdn.com/files/3a356fa6-cca6-4ffb-aa1f-da091fa8fa18/gta_5_digital_edition.pdf
    • http://sojisij.epizy.com/98753206662.pdf
    • http://gagadolena.epizy.com/what_to_do_when_nothing_is_going_right_in_life.pdf
    • https://uploads.strikinglycdn.com/files/1de2c38d-07c3-42e7-9054-70308620e138/48702691582.pdf
    • http://kejajuzajibig.rf.gd/32611597823.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_off0000cf9f.bin
e6dfb8480ff10f69e11f98870c96cd2956fab4392b1da4aac6ed9bb3c304219f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9F 5272 bytes
font_01_sfnt_off0000e189.bin
a1a3cbe645815afe4d7f9354a0b93126691c07549a460290b0975c3c6e5b48a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 10512 bytes