Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94973e4d66843d3…

MALICIOUS

PDF

78.7 KB Created: 2021-03-13 15:30:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30b8a6209dc0376ed6d54655fada2ed4 SHA-1: 99983621995399ccc172438d5420d0c1f8dc520e SHA-256: a94973e4d66843d3c2c3435f34c5ff7213f7caf4d6875effdac9740847b044ed
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detection confirms its malicious nature. The ML classifier also strongly flagged this PDF as malicious. The presence of an external URI suggests the document is designed to redirect users to a potentially harmful website, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=wow+macro+commands+target+self
    • http://alex-chekalev.com/99681681632kp8iz.pdf
    • http://naturapple.space/zidaw0ub16.pdf
    • https://cdn-cms.f-static.net/uploads/4476140/normal_5fd9fbc30d911.pdf
    • http://bukupiduge.mypressonline.com/zavonak.pdf
    • http://tigafik.mygamesonline.org/windows_server_2012_r2_datacenter_vs_standard.pdf
    • http://epaytds.xyz/honda_pilot_owners_manual_2012jp60q.pdf
    • http://opit.space/bose_wave_music_system_iv_with_cd_player_and_alarm_clockzu7cy.pdf
    • http://bristol-yalta.run/yin_yoga_poses_for_lower_back_pain4tff5.pdf
    • http://datovufes.scienceontheweb.net/atal_pension_yojana_2020.pdf
    • http://genusadnlo.space/crepe_paper_rose_templatebd5dl.pdf
    • http://futup.ru/troy-bilt_21_self_propelled_mower_reviewaxvbh.pdf
    • http://topdiscount.pro/how_to_bypass_iphone_activation_lockiu6hd.pdf
    • http://axecheat9.xyz/how_to_play_la_la_land_mia_and_sebastians_themehjtx0.pdf
    • https://cdn-cms.f-static.net/uploads/4417997/normal_5fd69acfa1bd5.pdf
    • http://twoup-viktoria.online/78188187892p8aao.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_7e03e7d323434b4abbdbce86aef7099a.pdf?index=true
    • http://likewiwojuxus.atwebpages.com/jaretunojoginiwajelobebut.pdf
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_e0feff10c52f47d9a791333dfbe5edaf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a9.bin
1fb51093c1b11e51ded7396f9d44f8f15f40b3542014784fa7c70df081bf8939
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A9 5448 bytes
font_01_sfnt_off0001062f.bin
18d9fec9ffee684449a80153e730f43efd2a72cbfc68e4206476da9e74c98ab0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 11568 bytes