Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d5d8e4fffc3a12…

MALICIOUS

PDF

80.1 KB Created: 2021-03-26 08:07:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f4747043b73fa3b9cee963c51920d0c SHA-1: 33c6eb4cc038daa4fa054ab3181fd5c45d188bc7 SHA-256: 96d5d8e4fffc3a12efd606c32f4c39858ebc013cfd08ae82af9ebef70f48068e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/123?utm_term=manorama+multiplex+app
    • https://kasexesupa.weebly.com/uploads/1/3/1/4/131437862/tikezikasam_xubixi_vaxaforit_voxexa.pdf
    • https://tasoxagizuj.weebly.com/uploads/1/3/4/7/134734804/sutixawar.pdf
    • http://online-bestshop.xyz/where_can_i_buy_a_sim_card_for_a_tracfone8qrjv.pdf
    • http://cardio-active.site/lamborghini_gallardo_lp560-4_spyder_performanteoxn4o.pdf
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/woselavepomogumuwo.pdf
    • https://zeduwekikozive.weebly.com/uploads/1/3/6/0/136050246/xujotisuwuvuped.pdf
    • https://davijune.weebly.com/uploads/1/3/5/3/135315517/adedb6e4947.pdf
    • https://xowasesulozuvuv.weebly.com/uploads/1/3/5/3/135347394/jopurejo-maxukenukodad-kadobijiga-jofidozitisu.pdf
    • http://unreguezff.rest/25163434385tgkna.pdf
    • https://wuwesojelure.weebly.com/uploads/1/3/5/9/135973580/wikixegikix-vafalapiwuvuwa.pdf
    • https://gefeteki.weebly.com/uploads/1/3/4/3/134310298/pumejalejedalimi.pdf
    • http://makamar.online/cake_baking_recipe_book85fmc.pdf
    • https://gesovomovo.weebly.com/uploads/1/3/4/7/134716395/fc81121869294a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • https://s3.amazonaws.com/rexogeguxosix/xagusu.pdf
    • https://s3.amazonaws.com/juzewojavomofew/32872474863.pdf
    • https://s3.amazonaws.com/jutenojamega/nejenolanilobowepagewa.pdf
    • https://s3.amazonaws.com/jolunenafobuw/free_kjv_study_bible_app.pdf
    • https://s3.amazonaws.com/jarawaxanivu/29577535758.pdf
    • https://s3.amazonaws.com/bisapovepizaj/30328928093.pdf
    • https://s3.amazonaws.com/selivuvumepaveb/morning_and_evening_duas_with_english_translation.pdf
    • https://s3.amazonaws.com/bagokiko/north_indian_food_menu_list.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
    • https://gitlab.com/smc/meera/blob/master/COPYING

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edff.bin
a46ea7de011a34fb52e953dda143ce188c0ee29880756bb1689d4d9761e0772d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 4860 bytes
font_01_sfnt_off0000fe77.bin
3ca2ef88045a3e90b57a1fd78fc196a16080de5422a903c6d60fd61c26fb0892		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE77 4044 bytes
font_02_sfnt_off00010df2.bin
88ef714d1f672d7891e5bfc58d11af2282759f5eb812cf1ddbc433106b8c1e6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF2 10796 bytes

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