Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e9ec03e1b52757…

MALICIOUS

PDF

93.1 KB Created: 2021-04-07 18:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6ae6797b27721eea367a9f682b4080fe SHA-1: 1245fa16f074e83c23cc6061e18bf3e30c2fed85 SHA-256: e3e9ec03e1b5275765ae207a47e36b38d6d4bc281e3b706f081f0dd834bfbc20
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains heuristics indicating a social engineering attack, specifically a 'ClickFix' lure, instructing the user to execute commands via Win+R or a terminal. This suggests the document is designed to bypass macro restrictions and prompt the user to download and run a secondary payload from a provided URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/123?utm_term=steam_api.+dll+pes+15 PDF link annotation
    • http://pasendapp.online/84718789113g0uz9.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/dhcjhU2/paul_hardcastle_greatest_hits_zip.pdfIn PDF document text
    • https://cdn.sqhk.co/lojenozasila/ihhhNb6/72276725312.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/GhIhihi/weather_radar_forecast_california.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/jjgnjic/anti_censorship_software_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/hikjhfN/xekojejevoxuje.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/aiwjijc/car_mechanic_simulator_m3.pdfIn PDF document text
    • https://cdn.sqhk.co/bowevuva/FvBjcha/karepemafiveje.pdfIn PDF document text
    • http://rutekotugu.22web.org/92335799046.pdfIn PDF document text
    • https://cdn.sqhk.co/tixelila/jczjeih/youtooz_unus_annus_discount.pdfIn PDF document text
    • http://trastqort.online/83686900305tdxux.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/auiigiJ/stickman_shooting_games_on_crazy_games.pdfIn PDF document text
    • http://ihsteam.ru/the_little_seagull_handbook_3rd_editexccm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6da966-e856-41e1-b997-6faed8f1f629/que_es_la_inteligencia_emocional_de_goleman.pdfIn PDF document text
    • http://rubipupajet.rf.gd/nixejara.pdfIn PDF document text
    • http://bibekuxamawijoz.epizy.com/13422519222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6184a49c-9545-4a70-b030-c684ea85dd6f/40837891975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af49a195-9f7c-47f8-bffd-c1ecc16e4b8f/pufexezagonukan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e8c63a-b079-4909-9246-a348f1beb15e/jufogemufujofegigalezoda.pdfIn PDF document text
    • http://fitariruzazu.epizy.com/5213211540.pdfIn PDF document text
    • http://divejujazol.epizy.com/chinese_symbols_names_generator.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AD 5352 bytes
SHA-256: a21b32c2dad41309836ae88c60642ccb0078aa296431950cef7fe6705c2da578
font_01_sfnt_off000126e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E7 13068 bytes
SHA-256: da6f26321729c7655377d275ff2e22bd08b51575fc8ee67a5da6b8d03f9301a6
font_02_sfnt_off00015166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15166 16204 bytes
SHA-256: 73bb1f519e29941fc98367ae33a8b679223d41029fbf73fb5c585da9ec8c2502