Malicious PDF — malware analysis report

Static analysis result for SHA-256 73cbb515e535614f…

MALICIOUS

PDF

69.9 KB Created: 2021-03-08 10:24:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7402a7d1a9bfc03bff28d7c7109aea66 SHA-1: 28c483e766ceb897b099b3a3a9db70b19545d9c5 SHA-256: 73cbb515e535614fc73942d5b0e2b1ecb01ade3e5c2871d5b77a728d60c12884
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 both heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to a product listing, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of external links indicates an attempt to redirect the user to a malicious site.

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://ponafet.ru/123?utm_term=dyson+cinetic+big+ball+animal+canister+vacuum+w%252F+attachments
    • https://cdn.sqhk.co/vigesiji/hjDmiaU/3d_basketball_games_nba.pdf
    • http://pedron.fun/plastic_analysis_of_frames_examplesmyoyf.pdf
    • https://static.s123-cdn-static.com/uploads/4455659/normal_5ffa0e04e83bc.pdf
    • http://thepropheticapp.com/sizulijijemosaip.pdf
    • http://pemufosapakem.mypressonline.com/cyberpunk_2077_third_person_mod_ps4.pdf
    • http://sowopezamiw.medianewsonline.com/how_to_use_blender_for_roblox_gfx.pdf
    • http://zofunubesosena.mypressonline.com/the_sherlock_holmes_collection_7_book_box_set.pdf
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/vumefafetobafopun.pdf
    • https://cdn.sqhk.co/welosezu/6ihif5g/thumb_fighter_christmas_unblocked.pdf
    • https://cdn-cms.f-static.net/uploads/4371553/normal_601faca149dff.pdf
    • https://cdn.sqhk.co/sipobufiw/legejf2/bearded_dragon_for_sale_craigslist_michigan.pdf
    • https://kukevukoleguko.weebly.com/uploads/1/3/4/2/134265740/a31669871.pdf
    • http://joy-todays.online/ccir_601_formatvteow.pdf
    • https://cdn.sqhk.co/nemuvefik/bziagi2/sanitarium_blues_lyrics.pdf
    • https://koruguliduni.weebly.com/uploads/1/3/4/8/134896859/susevezas-salalekerun-kudisawifex-kuxil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vigexosav.myartsonline.com/mindhunter_john_douglas_audiobook.pdf
    • https://s3.amazonaws.com/venunamazozuzo/kenulax.pdf
    • https://s3.amazonaws.com/limepusotanal/jupiwizera.pdf
    • https://s3.amazonaws.com/wazorixekunafob/trumpet_voluntary_in_d.pdf
    • https://s3.amazonaws.com/jivuxo/blue_prism_utility_file_management.pdf
    • https://s3.amazonaws.com/tesasubawalozan/c_stringstream_hex_format.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_off0000d307.bin
c1ecd5128d15a321013ec2777cb0bc6316c588ed0191270335ab667b9b567e72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD307 5640 bytes
font_01_sfnt_off0000e642.bin
d9a3a7804e9076f1aa9b268f5418db1e5dc0faaead790be0833380c5ba672777		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE642 10216 bytes

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