Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff741176b3a50245…

MALICIOUS

PDF

74.3 KB Created: 2021-03-29 21:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 175941b95e09946313ef0c5fe95b2ecb SHA-1: 75e6d53708cb5ec620bb44160da555d9d9723d24 SHA-256: ff741176b3a502451c16ff35c4e477d36fa3623a30233905ccfe0d6e0752a699
124 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, suggesting it functions as a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8022

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://crophysi.ru/strik?utm_term=thinkpad+t430+9+cell+battery+life
    • http://indir-kazan.com/elementary_statistics_picturing_the_world26gw9.pdf
    • http://lnstagaram-verifiedbadges-from.com/why_wont_security_light_turn_offp1e4l.pdf
    • http://ilook.market/motorola_cable_modem_sbg6580_manualwi43b.pdf
    • http://praktika-ingenieur.com/bring_your_a_game_meaning2zunt.pdf
    • http://gallery-shop.site/where_to_study_international_law_in_europekykym.pdf
    • http://dobomasinuraz.iblogger.org/alzheimer_s_test_camel_answer.pdf
    • http://umdtheatre.ru/pudoxe53s9c.pdf
    • http://kleomaften.online/dwarf_beans_planting_guideunakp.pdf
    • http://freshka.fun/soil_mechanics_formula_sheety3pq8.pdf
    • http://helpcenterbusiness.xyz/desh_bhakti_all_ringtone_free5d3ho.pdf
    • http://dsv-trening.ru/sowamawodalofaturuziwesu7184l.pdf
    • http://wofeboz.66ghz.com/vekuvemikoxitab.pdf
    • http://skidki-day.store/gorijituvigafaxumogasaxut7ar.pdf
    • http://raicen.com/what_personality_types_are_compatible0vqdv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nexuvojof.epizy.com/catapult_sports_annual_report_2018.pdf
    • http://tikolikenugim.epizy.com/kansas_city_chiefs_injury_report_week_17.pdf
    • http://koxowasone.epizy.com/87163190952.pdf
    • http://kobuxotaregudes.rf.gd/application_of_biotransformation.pdf
    • http://jiwepatifon.rf.gd/construction_project_manager_job_description_template.pdf
    • https://uploads.strikinglycdn.com/files/a5e65318-241d-4245-9c3d-b9f867448e02/how_to_calculate_molar_mass.pdf
    • http://wubiwasomiduxi.epizy.com/85386281655.pdf
    • http://xijixabomama.rf.gd/57299317062.pdf
    • https://uploads.strikinglycdn.com/files/4252f73e-6e74-4194-9869-af75796218f5/which_book_is_best_for_physiology.pdf
    • https://uploads.strikinglycdn.com/files/8c127bea-7dac-4975-b1fd-3e07c015b853/33942029131.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a56.bin
79d4ab219452e40e222295886667dffe171527fa515e224e33c965e8e554194e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A56 5868 bytes

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