Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc4326a9fba2f9f…

MALICIOUS

PDF

73.9 KB Created: 2021-03-19 08:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 22769ebc32009407d9b043e4ac6f3c64 SHA-1: f3bac815dc3f4ab005d996442567b6c2e468ee60 SHA-256: bdc4326a9fba2f9f5406e546c9abd7f356bfd87382b74b236ed1cadb491109c7
126 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://resalured.ru/strik?utm_term=uk+statistics+on+human+trafficking PDF link annotation
    • https://livadekawa.weebly.com/uploads/1/3/5/3/135317457/dipof-melagolefurubi-fominovoneniwi-vubeminazup.pdfIn PDF document text
    • http://mabapip.22web.org/fabobovebatofovu.pdfIn PDF document text
    • http://life50it.pro/homelite_electric_chainsaw_chain2eino.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/eKGjbid/axis_football_2017_gameplay.pdfIn PDF document text
    • http://idslim-italia.site/230076471662kqku.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/jbkjbLW/wooden_sofa_set_designs_for_small_living_room.pdfIn PDF document text
    • http://grenkasalo4.xyz/89051415821kpkyt.pdfIn PDF document text
    • https://cdn.sqhk.co/tobijoge/fiimjjK/52666364004.pdfIn PDF document text
    • http://opensalon.xyz/zafanikizapofadetujifimgqvgk.pdfIn PDF document text
    • http://yachtcharter.group/jorogusewinasasofav7zb30.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/dekiveserigagoko.pdfIn PDF document text
    • http://fb-ig-violation.com/empires_and_puzzles_heroes_list9gq3w.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/gZ5ij3q/dragon_warrior_3_pyramid_walkthrough.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_a4d595d69bd140298141493a4a7cedee.pdf?index=trueIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_94cc2915f6a940929b84700ea4aad017.pdf?index=trueIn PDF document text
    • http://jaziwovapotulit.epizy.com/free_expense_report_printable.pdfIn PDF document text
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_bb66e95ef77c4287a37005fbb5eb8bff.pdf?index=trueIn PDF document text
    • http://xenavak.rf.gd/what_generation_is_my_kindle_fire_d025.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_off0000e46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46D 5316 bytes
SHA-256: af4c046ae23055594500c62bf53e157c5c0d066eb552184d6618f3fd5b88401e
font_01_sfnt_off0000f663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF663 10620 bytes
SHA-256: 03d6e85a30d9a44d3a196c4d9358d7eaa238095e60cc10671c3ea56f5dd36350

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