Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86c94eac77a9192…

MALICIOUS

PDF

75.0 KB Created: 2021-05-12 11:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3901f7baa4783dcbed5bd79cb0b29bab SHA-1: c8e533035dca4b3457038bf53f302a960c330342 SHA-256: f86c94eac77a919254648715761a8003b746c2084b753bf509689e5c3e64ecf2
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a generated document used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://jumiwimov.ru/strik?utm_term=stinky+steve+vs+the+burpinator+pdf
    • https://cdn.sqhk.co/peposusuwi/mibiavg/categorias_gramaticales_espaol.pdf
    • https://cdn.sqhk.co/wafixagi/jhihghb/crash_bandicoot_race_ps4_cheats.pdf
    • https://cdn.sqhk.co/sowanigog/geTgcge/wijidujefoguvinewezi.pdf
    • https://cdn.sqhk.co/dusujukakal/Yif5m7B/t_mobile_cheap_phones_without_contract.pdf
    • https://cdn.sqhk.co/jiguluzufuwa/1L3hWGy/csr_racing_3_cheats.pdf
    • https://cdn.sqhk.co/jabosuve/igeMpSg/93665361888.pdf
    • https://cdn.sqhk.co/fefamuve/gcgeheT/lupezekowufabarotodan.pdf
    • https://cdn.sqhk.co/moviferu/qG5RjfD/tuviwelebebazewugiwoz.pdf
    • https://cdn.sqhk.co/kevovevude/tQ2ih97/best_word_game_apps_free.pdf
    • https://cdn.sqhk.co/zarejesorufo/ec3jgjf/60896579738.pdf
    • https://cdn.sqhk.co/puxedimuwo/jahb8ge/toxanojijodasapoxalupemid.pdf
    • http://notojubemeduxan.iblogger.org/amtrak_northeast_regional_schedule.pdf
    • https://cdn.sqhk.co/nupasoxure/hbjggh5/sims_4_football_career_cheat.pdf
    • http://zegevuk.22web.org/btinternet_mail_server_settings_android.pdf
    • https://cdn.sqhk.co/bipuzojafa/ig6RgcX/rush_hour_2_cast_isabella.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pakoxerevigere.epizy.com/calvary_temple_8th_album_songs_free.pdf
    • http://jamujufumazuwir.rf.gd/2754822030.pdf
    • http://lotawovuvowuk.rf.gd/gonidu.pdf
    • http://figapow.epizy.com/vazutixogokogaxi.pdf
    • http://mowoled.epizy.com/40610405316.pdf
    • http://fomobiwudaz.rf.gd/speculation_tax_bc_online_form.pdf
    • http://zikifivetijunu.epizy.com/econometrics_by_example_free_download.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_off0000e7bb.bin
3000acba9f223b4fa4759a73919bb34557c0dec81c1c128c907eb822d26be65d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BB 5564 bytes
font_01_sfnt_off0000faa7.bin
27d2f1deaf8d6d8da58668a52a9e156a2c4a8abcb972a2b2effe09313d5473c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA7 10420 bytes