Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7871c6a3e1e49a5…

MALICIOUS

PDF

76.9 KB Created: 2021-03-10 21:10:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 702eef105912ccf0141776639bc6cd10 SHA-1: 1a11bd6ae5b225395d07cc06b65b97642cfac8db SHA-256: b7871c6a3e1e49a5541774c88033d81747aceca2026fc799b242945632ef78fa
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 critical detection score. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware distribution. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs strongly suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/award?keyword=mass+of+light+lenten+gospel+acclamation+pdf
    • http://padojuputiki.iblogger.org/22735876591.pdf
    • https://cdn.sqhk.co/firokizita/jihdQ1Q/riders_in_the_sky_woody_s_roundup_medley.pdf
    • http://lezofifividex.scienceontheweb.net/sujokudesajapedimapo.pdf
    • http://masonufidowex.iblogger.org/format_of_report_writing_in_english_cbse.pdf
    • https://bunekapizo.weebly.com/uploads/1/3/0/9/130969144/tovakeweb_pakugavusoz_kofobarazo_ruzibetuxeted.pdf
    • https://wuvumivew.weebly.com/uploads/1/3/1/4/131410662/2a89757594e8.pdf
    • https://cdn.sqhk.co/molodomo/NjbOZKL/76197049731.pdf
    • http://tufilevazoropiz.iblogger.org/41280773694.pdf
    • http://xelasurugopu.mywebcommunity.org/commercial_cool_portable_air_conditioner_14_000_btu.pdf
    • http://tarekupi.scienceontheweb.net/21921325456.pdf
    • http://fasekafalig.scienceontheweb.net/92585558095.pdf
    • http://kavakedego.scienceontheweb.net/what_are_the_5_characteristics_of_non_living_things.pdf
    • https://cdn.sqhk.co/tofatuxurejo/hjjjNH2/fogeno.pdf
    • http://vijevejumozugim.sportsontheweb.net/nerumogajemikekanijeba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://duzixaludu.rf.gd/nonprofit_acknowledgement_letter_template.pdf
    • http://vexolofifete.atwebpages.com/dungeon_lords_board_game_rules.pdf
    • http://fozilixugijuva.epizy.com/xazelolajigefulo.pdf
    • http://ronevudewakoreb.epizy.com/99427084875.pdf
    • http://ginowane.onlinewebshop.net/sutoxeworatebevixejexowu.pdf
    • http://sebavorapu.rf.gd/tokyo_ghoul_kaneki_images.pdf
    • http://xinifaduzinuvu.onlinewebshop.net/68623130250.pdf
    • http://fikilemekegupi.rf.gd/reading_comprehension_practice.pdf
    • http://nokolul.epizy.com/jirafanupajuj.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_off0000eea2.bin
fabf085750784e260486c4b9fcf2a099aaf9fbe83858d73148c5be40f5fe403e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 5480 bytes
font_01_sfnt_off0001012c.bin
5c6efbb508cca637661cd16156a1d25a8622b900519e46aa39bc0ef66f458ae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1012C 10364 bytes

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