Malicious PDF — malware analysis report

Static analysis result for SHA-256 478ee23968487299…

MALICIOUS

PDF

79.1 KB Created: 2021-03-12 12:15:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd6778862d1e04db6a660cf6f09b355e SHA-1: 165bef38544ea7d84cf3b0d5e898cedcf224befe SHA-256: 478ee23968487299f52c889f3dfcb670142ea9348cbbff91a176f193eded6f12
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated text and an embedded URL, strongly indicating a phishing attempt. The ML classifier and ClamAV detection confirm its malicious nature. The primary URL, https://golowaki.ru/award?keyword=certificado+de+preparatoria+falso+pdf, suggests a lure related to a fake certificate, likely to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/award?keyword=certificado+de+preparatoria+falso+pdf
    • http://mozujana.22web.org/zexovegebezadatas.pdf
    • http://ketousa.site/how_to_use_black_jack_felt_adhesivehbcfv.pdf
    • http://mimivamefigupe.sportsontheweb.net/current_affairs_january_2020_in_english.pdf
    • https://lozofedexipa.weebly.com/uploads/1/3/5/9/135969573/tuzajuradezoji.pdf
    • http://xomunuxeju.sportsontheweb.net/plantronics_backbeat_pro_5100_vs_galaxy_buds_plus.pdf
    • https://cdn.sqhk.co/moxibusas/qghhcje/gomo_phone_coverage.pdf
    • https://fotavimapuwe.weebly.com/uploads/1/3/2/8/132816041/eb6bb63bbf702.pdf
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/6427519.pdf
    • https://cdn.sqhk.co/nanagajog/fDsMj9t/super_smash_bros_ultimate_tier_list_mkleo.pdf
    • https://cdn.sqhk.co/xolanikipiz/shdFidG/gaming_wallpapers_for_pc_1366x768.pdf
    • https://cdn.sqhk.co/jolurakokulo/yvrgjgd/jadazefodiruviwojamem.pdf
    • http://kfnwejfnkwheklf.space/yiruma_maybe_sheet_musicjhcxq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_c26d1c60daca466fbc5111d153ccca62.pdf?index=true
    • http://wiwosotu.myartsonline.com/how_do_i_factory_reset_my_swann_security_system.pdf
    • http://rowezezivifa.epizy.com/functional_and_nonfunctional_requirements_for_library_management_system.pdf
    • http://mevonaku.rf.gd/abstraction_in_java_with_example_program.pdf
    • http://rukosivujuxu.atwebpages.com/what_is_a_subacute_rehabilitation_facility.pdf
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_bee3e1a2b3854b858e8352d7333189ae.pdf?index=true
    • 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_off0000f642.bin
85fbee1588e2adf622eae582bffe34d0a3d1e35a5b5b0c68d131f4485b8b7373
pdf-font-stream PDF embedded font (sfnt) at offset 0xF642 5052 bytes
font_01_sfnt_off0001077e.bin
7eefbb37d0f166c7a4ee4b4f97a3bbef34ced8047feac5f10889931be7b5cd7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1077E 11624 bytes