Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6cdaade2ca96a8…

MALICIOUS

PDF

74.0 KB Created: 2021-03-25 06:26:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3ee3552e0086d76e31c81db4dd3c9d34 SHA-1: dda33dfb49846759174b00f0cc88a2d2e93be49f SHA-256: ac6cdaade2ca96a8de45b15ae0a38aac965b828594455bca2d01ab23797f0866
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to educational materials, specifically an 'answer key', which is a common tactic for phishing or malware distribution. The presence of external URIs and the link farm heuristic indicate an attempt to redirect users to potentially harmful content.

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://bologen.ru/wix?keyword=gizmos+student+exploration+free-fall+laboratory+answer+key PDF link annotation
    • http://neo-tp.ru/trendnet_tew-731br_price_in_bangladeshfegsi.pdfIn PDF document text
    • http://meetsoda.club/how_long_should_chicken_cook_on_george_foreman_grill34kb0.pdfIn PDF document text
    • http://tradestaroffice.com/rixejatuvobebefov39q.pdfIn PDF document text
    • http://predouche.xyz/kipotaguvifonomiremoc6m80.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/zojirushi_commercial_water_boiler__warmer_169_oz_capacity.pdfIn PDF document text
    • http://vinnipoh.fun/dell_optiplex_7010_motherboard_form_factoryr35k.pdfIn PDF document text
    • http://doxisodezezaku.iblogger.org/kufil.pdfIn PDF document text
    • http://subonus.ru/43082846268sdcji.pdfIn PDF document text
    • http://luxshop21.site/19748723124iw7le.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/economie_politique_definition.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/what_is_wings_of_fire_book_1_about.pdfIn PDF document text
    • http://gufutaca1.xyz/25437500110su5jm.pdfIn PDF document text
    • http://fresh-ita.fun/alain_de_botton_course_of_love_reviewarevk.pdfIn PDF document text
    • http://cmb-accueil.com/bagutorogajovikarojabisbvmx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijurape.atwebpages.com/vedic_mathematics_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6bced7d-d325-4d26-a1e5-daf8cce05dd1/zojirushi_rice_cooker_cleaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82e2fc75-29b8-426f-b6b0-84cd310f3420/acurite_outdoor_thermometer_with_humidity.pdfIn PDF document text
    • http://tixenolas.epizy.com/how_to_dismantle_rowenta_iron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e45e9b-efbc-4eac-96e4-5c62c870ad5d/tofaruzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b77e0a-d475-40c0-a178-7faed5b51391/95842725245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1cf5834-735c-4211-aa61-adbe9c36204a/identidades_trigonomtricas_ejercicios_resueltos_faciles.pdfIn PDF document text
    • http://kikumofesokir.rf.gd/qld_tv_guide_cairns.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_off0000dee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE1 5764 bytes
SHA-256: c23953c62b5748001e52a77775834c2dac57312c1034445b4b97a30d967a9649
font_01_sfnt_off0000f294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF294 11068 bytes
SHA-256: 661fd76f8913513bbdab2aeade24127101d55c6fc1c4a9fc8d4ecf236d6bf82f