Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee12cbdc8f9d7c21…

MALICIOUS

PDF

83.4 KB Created: 2021-04-02 00:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: eb2eec722449e567b57829203ebf2410 SHA-1: 00d32af473001119510f81fa5dbfcf0621a5f739 SHA-256: ee12cbdc8f9d7c213a4b8a59c0b3abfc861a7e0198d6711a91d14195ff83632c
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'jacksth.ru', suggesting it's part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata suggesting it's a PDF related to 'seismic acquisition', likely a lure to encourage clicks on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=seismic+acquisition+pdf PDF link annotation
    • https://cdn.sqhk.co/mogizilo/gigVd3I/dovomotu.pdfIn PDF document text
    • https://cdn.sqhk.co/mojerakikav/ggRxFhh/tonapemuwovozukotetujoji.pdfIn PDF document text
    • https://cdn.sqhk.co/xozakatupab/geogfhy/thrift_savings_plan_and_401k.pdfIn PDF document text
    • https://cdn.sqhk.co/rasidepad/hfnY8jg/87556026830.pdfIn PDF document text
    • http://zanodopowe.sportsontheweb.net/fusagoxuzekupojefan.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/juzixoxavoxumozejuga.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/jsbcdhb/super_discount_city_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadidizi/geBhghg/anbe_per_anbe_song_whatsapp_status.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/QjcNieA/23587329691.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/2hhgNMJ/12543407664.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/ifjfTGr/ice_rage_apk_mod_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/ijgghv5/japofivetabo.pdfIn PDF document text
    • http://umkatrade.ru/what_is_the_formula_for_average_velocity_in_calculuslxrz3.pdfIn PDF document text
    • http://donbetosstreettacos.com/speed_queen_washing_machine_price_malaysiabxvow.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/cuNNz1y/83579853715.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/hiqhaBL/star_wars_pinball_switch_metacritic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://solejow.myartsonline.com/hp_officejet_4500_wireless_all-in-one_printer_drivers_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a7c88f1-ca95-4bea-afbf-ade6a3db5c34/garmin_dezl_570lmt-d_review.pdfIn PDF document text
    • http://wufikemofumop.atwebpages.com/maytag_bravos_xl_washer_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5139b770-e05f-4ca7-9e18-6a11e4d04be8/rugepumedesubik.pdfIn PDF document text
    • http://suzifoki.myartsonline.com/27396198503.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_off00010504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10504 5404 bytes
SHA-256: 35be79c1590a47327085545d14d4773871bf5dd7d5745d08f73d80417b93431e
font_01_sfnt_off00011758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11758 12324 bytes
SHA-256: 1a6d4afa6a12600c513df75748fe5d16a13aa3ab9585df30ef8c6bbacfecc924

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