Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad196cf07609a65…

MALICIOUS

PDF

83.2 KB Created: 2021-03-24 20:00:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd3912f47efd8d8c99fc985aabc7c7ec SHA-1: da7b3bcd28c7e55a540b77776d15155aa1ff321f SHA-256: 9ad196cf07609a65ca33cc5813b1acca67cada5ca85cf38aa94dfab9cec705eb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics confirm its malicious nature. The embedded URLs are likely used to redirect users to malicious websites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=codigo+ascii+para+signo+de+exclamacion
    • https://vipagavufedolaz.weebly.com/uploads/1/3/5/3/135350232/0cf82e61b.pdf
    • https://cdn.sqhk.co/nomitusibop/ieovhhh/stick_combat_multiplayer_stickman_battle_shooter_mod.pdf
    • https://cdn.sqhk.co/rizikodeni/hcQgujb/lemagiredokukolazeguduto.pdf
    • https://jorosavuzeloda.weebly.com/uploads/1/3/4/7/134755790/2452461.pdf
    • https://cdn.sqhk.co/sigagegijej/ie0tifd/wood_cutting_boards.pdf
    • https://cdn.sqhk.co/denugesugumu/bwuhaia/brightest_flashlight_2018.pdf
    • https://cdn-cms.f-static.net/uploads/4485695/normal_6025f4882a88c.pdf
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5fc87a2da9a1f.pdf
    • https://sulomotosepotu.weebly.com/uploads/1/3/4/7/134744650/belax.pdf
    • https://static.s123-cdn-static.com/uploads/4374838/normal_5feb4ebc06240.pdf
    • https://cdn.sqhk.co/japewaturu/iWzihpE/ben_10_alien_experience_gameplay.pdf
    • https://cdn.sqhk.co/jukelifawap/oahjhe5/fajomox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://mepumubim.rf.gd/sigedexixerumajezupevex.pdf
    • https://s3.amazonaws.com/vaxebisapesi/77418323901.pdf
    • http://jolatuziguxobe.rf.gd/eicher_motors_balance_sheet.pdf
    • https://s3.amazonaws.com/wemofodi/gulepuvozu.pdf
    • https://s3.amazonaws.com/lawakux/datekodaviniwu.pdf
    • https://s3.amazonaws.com/sinadi/anatomy_colouring_book.pdf
    • http://lulasiwafa.rf.gd/22414073920.pdf
    • http://bijalefopate.rf.gd/henri_cartier_bresson_the_decisive_moment.pdf
    • http://zedebepibepus.rf.gd/chaos_altar_prayer_guide_osrs.pdf
    • https://s3.amazonaws.com/pidufozu/rupeje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a9.bin
698d0a5d2bb4f14f1f92ebd713d95080836e7d465a1a9b210d257736d31c190b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 5192 bytes
font_01_sfnt_off0000e938.bin
0bae0cb77c2176d37cce67014c0fc7787aee066818e8585398049b6da1af0e9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 26932 bytes
font_02_sfnt_off00012f68.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F68 4324 bytes

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