Malicious PDF — malware analysis report

Static analysis result for SHA-256 436c80eb4f1426c5…

MALICIOUS

PDF

76.5 KB Created: 2021-03-24 20:21:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d08181f8ff63472e248c1b0dc31db1eb SHA-1: 50a6fc9efe20cf20990936d5a8789ce4a5a297f5 SHA-256: 436c80eb4f1426c5f73800569ebfc3526aa0ba3ec6e4db630bf7f5de48dba43f
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains text related to 'ffxiv' and 'ps5', suggesting a lure to attract users searching for information on these topics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://baarspo.ru/strik?utm_term=can+ffxiv+be+played+on+ps5 PDF link annotation
    • http://fimewot.xyz/2232829769143077.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/math_symbols_in_latex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_5fe947c1570da.pdfIn PDF document text
    • https://cdn.sqhk.co/rorexamuviz/ehbgege/42647557520.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/handbook_of_livestock_managementfzwxx.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/rqijmn6/idle_gun_merge_and_shoot_mod_apk.pdfIn PDF document text
    • http://tanenabav.getenjoyment.net/86517761136.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405179/normal_5fcd88a79faee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383925/normal_5fcd7badae728.pdfIn PDF document text
    • http://chatik85939775.fun/pitch_black_afro_songsqvr82.pdfIn PDF document text
    • http://kawlites.online/pottery_classes_for_couples_near_meggejx.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/formation_of_public_limited_company.pdfIn PDF document text
    • http://cz-nitrof.website/sunilubirewaseu3izo.pdfIn PDF document text
    • http://craftsmansmetics.com/linear_guide_roller_type5h9o8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_6044969820a5f.pdfIn PDF document text
    • http://cashbackk.site/xepesututubudinabh68nv.pdfIn PDF document text
    • http://mail-autoscout24.net/best_scan_apps90spa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448995/normal_600729b2aa675.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/d7f3da7c-aedc-4e4c-b3d5-401913c96e67/el_dador_de_recuerdos_2_pelicula_completa_en_espaol_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd80f324-ee73-45c4-aeb5-cb611803fa09/68000115667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15179a9-121f-4f6e-8336-1f6d50fb625b/how_to_sign_up_to_test_covid_vaccine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74bd7266-c56b-41af-bd44-72e20852c7e8/bob_books_sight_words_grade_1.pdfIn PDF document text
    • http://mijovutotukedes.onlinewebshop.net/81740239407.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA36 5340 bytes
SHA-256: a33757895ec93ed851c746fefa54392d47dce5b98a51be917f96ba729e2c9750
font_01_sfnt_off0000fc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC83 11292 bytes
SHA-256: 22dea0761e997224eced925b380fbb682e724f797f3dcbcc8c2c842e8ab8f78d

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