Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c68e759cbc94fe…

MALICIOUS

PDF

81.5 KB Created: 2021-03-20 17:09:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c056762ba6964f9958810d6b377b93a8 SHA-1: 5c31458a771d4973062326dd0bcdb65c4d9ca74f SHA-256: b4c68e759cbc94fe767011a324f3e3959b8499fa27c528f2d598ea2c195b549f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'golowaki.ru', disguised as a utility for exporting Gmail data. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a potentially malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/123?utm_term=export+gmail+to+google+sheets
    • http://tobalalupuvobiv.iblogger.org/remak.pdf
    • http://temilops.xyz/kisutotarubep5m50.pdf
    • https://cdn.sqhk.co/bikegola/rifichf/change_layer_fill_color_photoshop.pdf
    • https://cdn.sqhk.co/nurijodefa/6thakih/67560422386.pdf
    • http://zoomita.fun/vimotubeuoik.pdf
    • http://chisto-chisto52.ru/sesojikuibqb.pdf
    • http://nukowivoxom.iblogger.org/91524186961.pdf
    • https://cdn.sqhk.co/mowogibewu/GbA0jan/whisper_of_the_worm_catalyst_guide.pdf
    • http://mavpa.fun/whirlpool_gold_stove_top_control_lockq33kw.pdf
    • http://forpost-electrica.ru/teduxokuwojafam4vk2g.pdf
    • https://cdn.sqhk.co/kiribikiv/dSibMij/kotanikawovufe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gopifu/indian_army_song_ringtone_dj.pdf
    • https://uploads.strikinglycdn.com/files/5d59a44c-0ea8-4e47-a96d-de0b299163dc/us_army_reserve_jobs_in_puerto_rico.pdf
    • https://uploads.strikinglycdn.com/files/89f1b5f8-785c-4f17-b20f-8229fe551127/lg_front_load_washer_problems_oe_error_code.pdf
    • https://s3.amazonaws.com/gajabedafot/6th_grade_master_spelling_list.pdf
    • http://midabufab.rf.gd/86319951985.pdf
    • https://s3.amazonaws.com/xokebore/mevejuwe.pdf
    • https://s3.amazonaws.com/xisefowu/2008_bmw_328i_workshop_manual.pdf
    • https://s3.amazonaws.com/bufipevuril/volleyball_game_app_free.pdf
    • https://s3.amazonaws.com/gebukil/80627793986.pdf
    • https://s3.amazonaws.com/rotowan/ansible_templates_and_variables.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f599.bin
e9814a7c19b8843aa5e18e22002a6c1c7f4fd2c3b29add08307b76eafb092532
pdf-font-stream PDF embedded font (sfnt) at offset 0xF599 4940 bytes
font_01_sfnt_off0001066b.bin
e6204320f288a573e878761c690a6d08e17cd03bd433a6fe0cc38e44e469047e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1066B 10740 bytes
font_02_sfnt_off00012ad3.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD3 4324 bytes