Malicious PDF — malware analysis report

Static analysis result for SHA-256 2766b9553350fb5d…

MALICIOUS

PDF

77.4 KB Created: 2021-03-23 09:09:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 710d07bba4ffb369fda969200e2eb853 SHA-1: 6d03bfd570ec11a62caa8f00191746300a26282d SHA-256: 2766b9553350fb5d044d6ca6007fbe359c8b5e5bb8786717938af6a6f1cbc3e3
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 specific ClamAV detection name indicating a phishing trojan. It contains an embedded URL pointing to a domain that appears to be used for distributing malicious content, disguised as a worksheet. The PDF structure and embedded content suggest an attempt to trick the user into visiting the external URL, which is a common phishing or malware delivery tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/wix?keyword=solving+trigonometric+equations+worksheet+doc
    • https://cdn.sqhk.co/mojikeke/SggTge4/71271235420.pdf
    • http://bt-management.website/sigesomexekeziruruwewbyyrh.pdf
    • https://cdn.sqhk.co/vodadavubex/bjfggjc/pezado.pdf
    • http://drive4mclanemilwaukee.com/relion_blood_pressure_machine_reviewsqhdv0.pdf
    • http://shoes-storie.club/60526987560s4pxv.pdf
    • http://bovewitavivebu.getenjoyment.net/fuxuvonitaduvokowuxof.pdf
    • http://fadewujetenuve.mywebcommunity.org/pusebenozixifewisopine.pdf
    • http://kungfumalibu.com/zuwuwasexakeba0v0b9.pdf
    • http://cabinetshub.xyz/84184904599awhls.pdf
    • http://subonus.ru/frigidaire_affinity_top_load_washer_springs6e21w.pdf
    • http://job-finder.space/calories_in_a_taco_bell_crunchwrap_supreme694lq.pdf
    • http://dobuwiwitevotir.sportsontheweb.net/physics_today_book.pdf
    • https://cdn.sqhk.co/navififoro/R3oZpCx/ivry_hall_alabama.pdf
    • http://zomewegi.iblogger.org/ciara_ride_song_free.pdf
    • http://idealslim-italiaoficial.site/40017896879ye5f2.pdf
    • https://cdn.sqhk.co/bojowagawire/gDlzLhe/rivaguxo.pdf
    • http://pubgucbayim.com/borosituzapekebibevo4dbqs.pdf
    • http://coloradocustomelectric.com/pathfinder_ranged_tactics_toolbox13w0w.pdf
    • http://xapiduxirob.mywebcommunity.org/kuliwokaseruvuwupoziwan.pdf
    • http://baby-slings.ru/how_to_unlock_dbx_driverack_pa2w9m4z.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zujojokinit.epizy.com/low_anterior_resection_syndrome.pdf
    • http://zaguvigijosev.epizy.com/always_with_me_spirited_away_piano.pdf
    • http://texazufuvo.rf.gd/warhammer_40k_space_wolves_codex_8th_edition.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_off0000eb40.bin
91fc2a7a86824a1d45ffb8c34969b94174b1055cde85c0fd0df1127727777766
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB40 5796 bytes
font_01_sfnt_off0000fee3.bin
e92bf00b33084007c510f739ba9f166153a2a8171007ec3201ddc195f379605a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 11488 bytes