Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e6d38423bb223c…

MALICIOUS

PDF

73.9 KB Created: 2021-05-12 18:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c0263bfb337e1db975d275a1d0132739 SHA-1: beb045382b64999909f867f5a47fb63db8f98022 SHA-256: 80e6d38423bb223c039cabd7c4271e3e3110d92b375b4f182dafc74342b7727b
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into downloading further payloads or visiting malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=multiplication+worksheet+for+grade+4+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482872/normal_5ff546be6009f.pdfIn PDF document text
    • https://cdn.sqhk.co/sologavabo/rghidjg/apple_music_download_macbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482648/normal_601c79d96634b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474222/normal_5ff2def147b77.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/jahemgg/kids_movies_on_amazon_prime.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/bifdgcv/fopaviwefunawiluvox.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/PhhcOuR/prison_break_season_6_episode_1_full.pdfIn PDF document text
    • https://cdn.sqhk.co/refowofiros/gjgex7Z/clash_royale_hacked_app.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/Ydid2xu/zivopelizefumose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366367/normal_5fe44c5bb3a63.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/g6Qxoic/hydrofluorosilicic_acid_safety_data_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/wazotifuk/3jevWaz/world_war_z_gameplay_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/Ethjxjc/tangled_season_2_trailer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485172/normal_606a754a772b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419195/normal_6043064891d19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jamigiboweb.rf.gd/definition_of_research_and_development.pdfIn PDF document text
    • http://zolivowubek.epizy.com/flat_stanley_guided_reading_activities.pdfIn PDF document text
    • http://jemejuzot.epizy.com/causes_of_great_depression_of_1929_to_1933.pdfIn PDF document text
    • http://robinovedibepo.epizy.com/convert._lrtemplate_to_dng.pdfIn PDF document text
    • http://ruduwemuzivikis.epizy.com/jijorebes.pdfIn PDF document text
    • http://pedabosotepebek.epizy.com/clinical_biochemistry_tests.pdfIn PDF document text
    • http://tokafibalo.epizy.com/background_video_effects_hd_free.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_off0000e1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E2 5664 bytes
SHA-256: 84f61fd9c9e04524f73b786a61bf79f90b7e6d2fb9b23648efaf4df114f51a64
font_01_sfnt_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 10800 bytes
SHA-256: 7dca96d64c6034697261da94a8dc447800f3e107f95f25693691e68b47e0fefa

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