Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f83f6e8fc21c787…

MALICIOUS

PDF

82.2 KB Created: 2021-03-25 08:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96adbfaa440fe7da4b1f5303e4e8c254 SHA-1: d0111b12eea562a79185960ca134ad0c1e094756 SHA-256: 6f83f6e8fc21c787a4cb1fa0e6ec343080eb98cdf173974c179d57224f71c656
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that advertises a game download, likely a lure for users to download malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

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://vilenefex.ru/wix?keyword=gta+5+android+apk+full+game
    • https://cdn-cms.f-static.net/uploads/4476593/normal_60247eeda1170.pdf
    • https://cdn-cms.f-static.net/uploads/4489042/normal_600f28f3be038.pdf
    • http://newipufisatag.scienceontheweb.net/sanorusobovamumaxivavuz.pdf
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fdeec6511014.pdf
    • http://rozujed.sportsontheweb.net/credit_analyst_job_description.pdf
    • https://cdn-cms.f-static.net/uploads/4388827/normal_60446361361f5.pdf
    • https://cdn-cms.f-static.net/uploads/4489237/normal_5fd12d6c7da21.pdf
    • https://cdn.sqhk.co/goseluna/hIljb1O/12502053388.pdf
    • https://static.s123-cdn-static.com/uploads/4418579/normal_5fe4a0c095c70.pdf
    • https://cdn.sqhk.co/libewepigux/ejeibkX/angry_gran_run_game_free_download.pdf
    • http://nozuzatu.22web.org/the_promised_neverland_isabella_song.pdf
    • https://cdn.sqhk.co/gujowaxexag/SPjaihf/high_jump_dieppe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://webimonok.epizy.com/how_to_open_lg_inverter_v.pdf
    • http://luloxefisamo.rf.gd/zemikijigelo.pdf
    • https://uploads.strikinglycdn.com/files/edbabf96-10e6-465b-8808-43d3f66d7743/yufa_chinese_grammar.pdf
    • https://uploads.strikinglycdn.com/files/4fcbff3b-84c8-4d69-a7e7-a2ef572eb546/wupawugekixenebejewefofa.pdf
    • https://uploads.strikinglycdn.com/files/09c2277d-ada0-4b2e-b0a3-87b5e40b15e8/3311835400.pdf
    • https://uploads.strikinglycdn.com/files/635c7edb-338c-4f17-8644-b28500d17fdd/how_to_allow_flash_on_chrome_2020.pdf
    • http://golukotekitu.epizy.com/jinokabajesidisu.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_off0001047d.bin
912f5b34613d27b73034ab810d08240ee1c5bfdfddf04cec025eabc3f2a11d1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1047D 5404 bytes
font_01_sfnt_off000116db.bin
2cf8995ed73d6e5d3862c4d5cb8e320fe61f2b312b596fca2884c09c2026fcee
pdf-font-stream PDF embedded font (sfnt) at offset 0x116DB 10892 bytes