Malicious PDF — malware analysis report

Static analysis result for SHA-256 be66b0340589bb18…

MALICIOUS

PDF

81.6 KB Created: 2021-03-12 02:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc1e8a223ed663e3070332213477e14c SHA-1: b91ed18d79368b5c68d9fe8c66743806ad30b858 SHA-256: be66b0340589bb186166d41f08971808079ee647046e23b72a4b48f3fbf1af0d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to contain keywords related to business requirements, likely a lure to encourage clicks on the malicious links. No scripts were extracted, but the presence of multiple external URIs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=aiag+ppap+level+3+requirements
    • http://canlisohbetim.net/rca_galileo_pro_11.5_weightqxy93.pdf
    • https://cdn.sqhk.co/kuzosexiwugu/Dhejfd8/true_football_manager_3_patch.pdf
    • http://poxinezov.iblogger.org/tumab.pdf
    • https://cdn.sqhk.co/pobopuwubox/k7hdPhe/punctuation_worksheets_ks1_with_answers.pdf
    • http://bridgecommerce.com/greeting_card_storage_box_walmarte0wfi.pdf
    • http://gixitetopes.scienceontheweb.net/ielts_band_9_vocabulary_secrets_download.pdf
    • http://inter-kalinka.ru/82439387249oh9xf.pdf
    • http://jobs-ingenieur.best/does_msi_gtx_970_support_slib14mt.pdf
    • https://cdn.sqhk.co/bilanogakiw/yheCvhN/big_game_hunter_hearthstone_nerf.pdf
    • http://sbrf.link/pirenitjue6p.pdf
    • http://saxobupazes.sportsontheweb.net/rational_recovery_is_different_from_aa_in_that.pdf
    • http://vazitafolozif.22web.org/45993798638.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://durunorutap.epizy.com/23566427646.pdf
    • http://wezekopufoj.rf.gd/how_to_answer_sorry_for_the_delay.pdf
    • http://gomugugagaf.onlinewebshop.net/ziwisojas.pdf
    • https://s3.amazonaws.com/rudelazifizuvo/95444642949.pdf
    • https://s3.amazonaws.com/vovuzize/95827227309.pdf
    • https://s3.amazonaws.com/mubemutolewe/tewufalapudiwipuwewa.pdf
    • https://s3.amazonaws.com/datarofapakil/48031636117.pdf
    • https://s3.amazonaws.com/wozowuledij/putozinali.pdf
    • http://nudoritane.atwebpages.com/the_seven_principles_of_the_happiness_advantage.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_off00010224.bin
39ccb188687f6c73f952e1ed5677d881f3ae78fe7ff50e0ff784aa4c8f93abff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10224 5480 bytes
font_01_sfnt_off000114bd.bin
312f5b36ee2a6ff8785e7a077f7d1ffbcfbd38a33136b372719036871dd756e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114BD 10648 bytes

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