Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6ae3b7365de3b5…

MALICIOUS

PDF

77.5 KB Created: 2021-04-02 18:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d110771e17983dafff8355839e718595 SHA-1: c278ec01e12e67adba9d9e0fa957b41aeda72de5 SHA-256: 8c6ae3b7365de3b5ae18e1b3ae272de2f2f107162d5fe3deffa2880eb3ae1b44
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'jacksth.ru', likely serving as a lure for users searching for local food options. The PDF structure and embedded content suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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/wix?keyword=pho+menu+near+me PDF link annotation
    • https://cdn.sqhk.co/towevefizub/cWjdgft/tifuk.pdfIn PDF document text
    • https://cdn.sqhk.co/xatuxazaz/ghjdGii/96074552169.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/zggw6jh/4491435168.pdfIn PDF document text
    • http://wagugekewa.22web.org/gofetuvotijujoba.pdfIn PDF document text
    • http://baffer-shop.space/spanish_medical_interpreter_classes_onlinef4heq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5fd28f16810ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418584/normal_602283a6c912d.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/brandon_burlsworth_accident_who_was_at_fault.pdfIn PDF document text
    • http://persequenteamsohbet.com/what_is_listening_in_counselling30dnd.pdfIn PDF document text
    • http://3bki.ru/balboa_short_story_by_sabina_murrayh5ht3.pdfIn PDF document text
    • http://sukozuxari.22web.org/dizetefegagasiki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407998/normal_600610aed2bcc.pdfIn PDF document text
    • https://cdn.sqhk.co/pejinijew/ibo4Hij/76168698552.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/butterfly_valve_catalogue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489259/normal_5ff8b87eced75.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/80437309988.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/jiUoghg/nufetelavujuwo.pdfIn PDF document text
    • http://mamasebome.iblogger.org/reduce_file_size_to_80_kb_online.pdfIn PDF document text
    • http://vinograd.io/toshiba_flat_screen_tv_problemsrn43v.pdfIn PDF document text
    • http://kopatizukuxaluj.scienceontheweb.net/benami_transaction_prohibition_act_1988.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1482760a-5e2f-451a-b41f-4163f71be695/92718078143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1794df5b-0ec3-4325-8244-4d636ba6977c/60198702047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/879c3cfc-5c13-4204-a9d0-6db14c39e4b1/48798583805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1912aff8-0d17-4323-8705-6c16875536ea/how_to_build_a_easy_bat_house.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/93046481977.pdfIn PDF document text
    • http://kobizesamow.rf.gd/fujewomobi.pdfIn PDF document text
    • http://jasigobup.epizy.com/79403555000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab32334-181d-4eca-bb2f-1b838371a19b/96720970080.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE716 4468 bytes
SHA-256: 791e5e50c050ebb8e5ce157b9f051550023bdc2b056e72b8e51bba68cc2a89f2
font_01_sfnt_off0000f5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FE 10772 bytes
SHA-256: d688ff8484d1d5318afef6912c2eaa156c36ee4f930e82045bed121c7e45d1e4
font_02_sfnt_off00011a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A82 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e