Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f58cce9da2e3b3…

MALICIOUS

PDF

86.0 KB Created: 2021-03-25 13:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c74282f9039f8f5590656cf7acb94c2b SHA-1: 6850b3cfa38db50dd13e3c488888b26f2a9f40e8 SHA-256: c9f58cce9da2e3b33c100de9fbbdf1c5a4a994f1d5e126cd7ac692625462f1e1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be part of an SEO link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/wix?keyword=dissidia+nt+tier+list+yuna
    • https://cdn-cms.f-static.net/uploads/4452374/normal_601eadff48eb6.pdf
    • https://cdn.sqhk.co/pigevikuwi/jgfbEIP/piano_man_chords.pdf
    • http://1xbets-regs.site/ditefafagotoguzupusoz9h5nm.pdf
    • https://cdn.sqhk.co/jugemito/eGgfqgi/vatoduguw.pdf
    • https://static.s123-cdn-static.com/uploads/4465397/normal_600548563667c.pdf
    • http://masanakepatarar.iblogger.org/podorutovuwamixos.pdf
    • http://artdebug.site/canon_imageclass_mf4450_driver_windows_1004z4p.pdf
    • http://jinokawobusuzi.iblogger.org/deed_of_assignment_of_loan_proceeds_form.pdf
    • http://dikafitexexodix.iblogger.org/headgear_for_resmed_airsense_10.pdf
    • https://cdn.sqhk.co/bavomizobe/2o2iijg/brilliant_performance_meaning_in_english.pdf
    • http://bisipatelaloguj.66ghz.com/fordoun_weather_report.pdf
    • https://cdn.sqhk.co/vitozogog/gejcbup/87690404997.pdf
    • https://cdn.sqhk.co/xubewarow/jaibhid/ernie_the_big_easy_crossword.pdf
    • https://cdn.sqhk.co/rorajakura/ejbifhe/lojigoluzazek.pdf
    • https://cdn.sqhk.co/gejupajo/ijmZjd1/2140393956.pdf
    • https://cdn.sqhk.co/xuzuvazol/sij3jjL/master_the_police_officer_exam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kuminatunajovop.epizy.com/padosolefesawupos.pdf
    • https://fab88ded-2f12-46c9-b6ec-f290036286cc.filesusr.com/ugd/cce69c_4dca43a0c5e04a83865378d64095268f.pdf?index=true
    • https://72dfff08-f6cb-4f5d-aaac-ebe71175d6a6.filesusr.com/ugd/c268f7_4236ec15263f4504875ef1a7c88d0e07.pdf?index=true
    • https://77abcf6a-1f47-4233-a5f7-28832101be0a.filesusr.com/ugd/e29e5c_4dd839ac2c6049c5aabb356a54b22a6c.pdf?index=true
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_cbc31d82dbcd466eb923c2d924c44e70.pdf?index=true
    • 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_off000100d6.bin
c8b279e5d3395a678dc7596190c27f844be8f21a0767b4f664c9e08eaf6f4c91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D6 5024 bytes
font_01_sfnt_off0001123c.bin
194da02c03e23fd42220d9cf0e8f04f47bd282cd3f7be6dd498862cec9792917		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1123C 4920 bytes
font_02_sfnt_off00012313.bin
2f71fde0fdb4047ca3e4eb1ed10bfd5da32267fad8c1799209ac992c0eb4f248		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12313 11460 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.