Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a98641611633679…

MALICIOUS

PDF

96.1 KB Created: 2021-03-22 00:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a78255ed56401a4379bddfcc1664e49b SHA-1: e7e6f4b3cb82997d2666897ab41341fce107b32a SHA-256: 0a98641611633679fc57f0f3769f0a9a66ba1aa635743f8329d5185cad006ee6
136 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document is designed to trick users into handling a password-protected archive, a common tactic for evading gateway security. An external URI was found pointing to 'https://vilenefex.ru/123?utm_term=endospore+bacteria+pdf', likely serving as a download link for a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://vilenefex.ru/123?utm_term=endospore+bacteria+pdf
    • https://cdn.sqhk.co/jorisuzil/bbgfhhj/nostalgia_electrics_popcorn_maker_instructions_tpm-_100.pdf
    • http://luxasireku.sportsontheweb.net/budegotenobozuzumugu.pdf
    • http://gixodugesu.medianewsonline.com/1997_honda_shadow_ace_vt1100c2.pdf
    • http://fasekafalig.scienceontheweb.net/bolt_action_vs_semi_automatic_rifle.pdf
    • https://cdn-cms.f-static.net/uploads/4493201/normal_5fd0ba84cb8b2.pdf
    • http://zuduwamani.mypressonline.com/list_of_digestive_enzymes_and_their_functions.pdf
    • http://koxudizujan.mywebcommunity.org/fukobinad.pdf
    • https://cdn-cms.f-static.net/uploads/4375700/normal_603da5e30a965.pdf
    • https://cdn-cms.f-static.net/uploads/4487916/normal_6028834860c0f.pdf
    • https://cdn-cms.f-static.net/uploads/4485296/normal_5fdaf17716ceb.pdf
    • https://cdn.sqhk.co/gasawivu/hf3jiYM/superstar_career_dress_up_rising_stars_online.pdf
    • https://cdn.sqhk.co/kufomopinu/cFMgeeX/16497450369.pdf
    • https://cdn.sqhk.co/sovanoniwuva/Dic3hgX/85985672502.pdf
    • https://cdn.sqhk.co/zunezafi/2qohgAp/bizajazipu.pdf
    • http://jolovomolosubi.getenjoyment.net/vox_ac15vr_footswitch.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://varirojemixu.myartsonline.com/hp_42s_manual_espaol.pdf
    • https://uploads.strikinglycdn.com/files/27900ce2-9c32-49c3-9cea-ef76934596bd/how_to_cite_a_mobile_app_in_apa.pdf
    • http://luregaw.onlinewebshop.net/noxovunakinuvi.pdf
    • https://uploads.strikinglycdn.com/files/3dbf3c90-afd8-49f7-8d58-ea482dc643fe/arduino_ide_for_windows_7_32_bit_free_download.pdf
    • https://uploads.strikinglycdn.com/files/283e774e-0701-4d6b-af43-676edcef5783/vita_lumin_shade_guide_order.pdf
    • http://lijowavatajo.myartsonline.com/online_web_to_word_converter.pdf
    • https://uploads.strikinglycdn.com/files/5eb5199c-1784-4c9c-898d-41bf9d713bfc/assassins_creed_origins_prima_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ddc.bin
432254fa7b0b5ba60243b5fc77680e8096197fc880f1ba64cb718d16e25ac9de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDC 5004 bytes
font_01_sfnt_off00013ede.bin
d3bda1ff82911fcc2de2728963b88da51dd4dbe2ae6ecb63781463f606687ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDE 11232 bytes
font_02_sfnt_off00016530.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16530 4324 bytes

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