Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7530cc294dc02a…

MALICIOUS

PDF

70.6 KB Created: 2021-05-09 04:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 003a61d0e0e91d7624889cf6ab1281eb SHA-1: bf552bcf8de013787425caf7514048c54a17e8a2 SHA-256: 0c7530cc294dc02ac7f6080d689b5fe3983015022077e074d03b879ffccc1c2c
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically pointing to 'xezojetit.ru' and using 'ea sports ufc 4 ps5' as a UTM parameter, suggesting a lure related to the game. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high number of distinct, disposable hosts, reinforcing the phishing or malicious distribution intent. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=ea+sports+ufc+4+ps5
    • https://cdn-cms.f-static.net/uploads/4365636/normal_600c9a6b6b0fa.pdf
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/pibomisatarolabo.pdf
    • https://netigobulon.weebly.com/uploads/1/3/4/0/134096742/2014620.pdf
    • https://static.s123-cdn-static.com/uploads/4373008/normal_5fdfa3dc18f87.pdf
    • https://cdn.sqhk.co/pabukerofo/ihuAjjB/real_steel_2_trailer_2019.pdf
    • https://xixezowipena.weebly.com/uploads/1/3/5/3/135341666/kepabizokuwaj.pdf
    • https://cdn.sqhk.co/nawiwola/hghf27I/89838263909.pdf
    • https://cdn-cms.f-static.net/uploads/4422622/normal_6059baa617385.pdf
    • https://cdn.sqhk.co/moserusoba/jjEfieo/formula_car_racing_impossible_turbo_car_trafficking.pdf
    • https://static.s123-cdn-static.com/uploads/4373264/normal_5ffcc0b797003.pdf
    • https://cdn-cms.f-static.net/uploads/4365653/normal_6057e38ef0643.pdf
    • https://cdn.sqhk.co/mifigatira/zcfhbhc/teddy_bridgewater_fantasy_week_6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b53300f5-9da7-4819-99ef-ee11ed954ca2/41360934691.pdf
    • https://s3.amazonaws.com/buxoparadazegu/similar_triangle_worksheet.pdf
    • https://s3.amazonaws.com/wivunonovef/8606554847.pdf
    • https://uploads.strikinglycdn.com/files/d3ef1583-ce61-4e8f-92cc-168cc07c4e3a/how_to_reset_super_lifejacket_jolt.pdf
    • https://s3.amazonaws.com/fopalew/christian_bible_new_testament_books.pdf
    • https://s3.amazonaws.com/towutoginadivu/bleach_vs_naruto_3._0_all_transformations.pdf
    • https://uploads.strikinglycdn.com/files/f5e6608c-6cb1-4717-bc61-98bcbcd4eefc/51839722137.pdf
    • https://uploads.strikinglycdn.com/files/800eed40-b083-406a-abae-5d999fc6bb36/rifatesese.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_off0000d6bd.bin
ccd878e1a90d05e9fff27a4c566c9ecf8b04b431f5fa688b9336de8d468e18ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BD 5148 bytes
font_01_sfnt_off0000e860.bin
82f1cffc36e893cf816f4bd67ec759cc451b51ca1253dcd526243262bc0e8d86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE860 11360 bytes

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