Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb359d126ecb74ec…

MALICIOUS

PDF

79.1 KB Created: 2021-03-06 01:42:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 336f16c998f763d63eeff580eed8e1c7 SHA-1: ef1327edd021a347e29a0293a9aed1e3fe84675a SHA-256: bb359d126ecb74ec17976737a6879b91ace8d2d692ed6236131ce3d47869c17f
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that redirect to various domains, many of which are flagged as suspicious or unknown. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains keywords related to games, suggesting a lure to attract users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/wix?keyword=military+games+3d
    • https://cdn.sqhk.co/woledibiroju/VhfhjMd/9861073845.pdf
    • http://zdorovie-vashe-vse.xyz/5th_grade_social_studies_worksheetsco0xk.pdf
    • http://mnclassis.org/rizotido7ie28.pdf
    • http://xoziduso.mypressonline.com/wizurum.pdf
    • http://lightstart.xyz/derechos_de_humanos3q7h5.pdf
    • http://nijaxubazaziw.mypressonline.com/37993146327.pdf
    • http://simultaneously.space/angry_snakes_attack_snake_eater_runesilkd0.pdf
    • http://talajifit.mywebcommunity.org/hp_pavilion_all-in-one_-_27-a240se_manual.pdf
    • https://cdn.sqhk.co/xarozowuzosa/IMjjTJF/amazing_world_gumball_games.pdf
    • https://cdn.sqhk.co/xosifusozat/eDIgdem/amazon_prime_video_subscription_cost_ireland.pdf
    • http://uspex22.online/gaximodifogavagevu6zzs.pdf
    • http://islta.fun/ipl_2019_time_tables4xol.pdf
    • https://cdn.sqhk.co/lukulugere/cVjbLds/word_market_level_297.pdf
    • https://cdn.sqhk.co/zabitokepum/BrLlgjQ/pokemon_center_plush.pdf
    • http://felagem.getenjoyment.net/the_crucible_john_proctor_tragic_hero_quotes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zawagebojirowe.rf.gd/ob_gyn_history_template.pdf
    • http://rakumutebita.epizy.com/matul.pdf
    • https://s3.amazonaws.com/kovilowab/free_cv_template_design_docx.pdf
    • https://s3.amazonaws.com/xamapebonijos/pexevolajamebog.pdf
    • http://womutevu.rf.gd/finanevusulamis.pdf
    • http://limoxukuk.atwebpages.com/vaxofelu.pdf
    • http://pavadujutupa.epizy.com/copepodos_marinos.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_off0000f83c.bin
0f76d90723ec7df54b8b816a77bfe5f0b533974d951f8e469671d71fe469d21f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF83C 5416 bytes
font_01_sfnt_off00010aa4.bin
993b75224f5bbc2632d69934febacf884cbdc33b70d334aa5d78d70b6a0d39cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA4 10704 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.