Malicious PDF — malware analysis report

Static analysis result for SHA-256 72901a7ce5103151…

MALICIOUS

PDF

79.9 KB Created: 2021-04-08 05:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd66cd5c9c7091d5628143c5ac0c0ba4 SHA-1: 7962af6f06679c41707af1c10c05bea925b2c48b SHA-256: 72901a7ce5103151d821e0e9787011f38f0ce22f109209468839221ed8eaef08
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious URL, identified by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure, likely attempting to trick users into clicking the malicious link by mimicking search results. The presence of external URIs and the ML detection strongly suggest a phishing or malware distribution attempt.

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://kuzutuzo.ru/strik?utm_term=the+wrath+and+the+dawn+books+in+order
    • https://cdn.sqhk.co/lenubire/jehghhd/29739959795.pdf
    • https://cdn.sqhk.co/sixajuzap/jhhmC3d/kelevagaraxavogepap.pdf
    • https://cdn.sqhk.co/fopalixogul/h1cifgd/eso_dragonknight_pve_build.pdf
    • https://cdn.sqhk.co/barugogip/gZVlmii/65361987443.pdf
    • https://cdn.sqhk.co/gizoxemovefi/hjh6whf/tafis.pdf
    • https://cdn.sqhk.co/pinofizulag/dfiiKhc/barbecue_grills_at_walmart.pdf
    • https://cdn.sqhk.co/pabelewexo/hgiezcD/15964801600.pdf
    • https://cdn.sqhk.co/mijajijem/gf4b0hd/monthly_calendar_november_2020_printable.pdf
    • https://cdn.sqhk.co/luwivimexu/gjheVij/21637693592.pdf
    • https://cdn.sqhk.co/litonesi/PQjdkgc/51431554051.pdf
    • https://cdn.sqhk.co/xanovika/ggignij/pokemon_go_game_pikachu.pdf
    • https://cdn.sqhk.co/rifojimuna/hhrMha8/mevajowidof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wanalovum/twitter_for_laptop_windows_8.pdf
    • http://gapevizatijaba.epizy.com/19058996484.pdf
    • https://s3.amazonaws.com/zuniverijesud/92148733872.pdf
    • https://s3.amazonaws.com/fekaduvopigab/kodifemu.pdf
    • http://nurojujejabilu.rf.gd/thinkertoys_book.pdf
    • http://lovemogifad.epizy.com/spoken_english_online_classes_in_hyderabad.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/admin_panel_bootstrap_templates_free.pdf
    • http://sudogirelokuf.epizy.com/jurisprudence_exam_texas_nursing_answers.pdf
    • https://s3.amazonaws.com/mokamoba/64143711153.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_off0000f7d5.bin
04f94d0e39f49cbb916be582be7420f8844613afe8cbd1c3cde7236f676299f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 5128 bytes
font_01_sfnt_off0001094b.bin
9bd7c6b2a60ece3ac79abde9612f245ed6c7023c4a2b0027f468d2b5ac08c189
pdf-font-stream PDF embedded font (sfnt) at offset 0x1094B 11760 bytes