Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e9caf8ac1b8c83…

MALICIOUS

PDF

72.7 KB Created: 2021-02-24 21:22:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 5bc588892a34c6b9fff45ff83492253f SHA-1: 298a702b322ba5c8cdea5e858fb028bc736aa422 SHA-256: 80e9caf8ac1b8c83d2eb9ffd0eec9655bf3969e170d10e369df3ac8b56c8de60
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to search terms, suggesting a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=computer+coding+classes+near+me PDF link annotation
    • http://summ-ita.space/93599709817axklu.pdfIn PDF document text
    • http://appletopshop.ru/8791312924vnkq0.pdfIn PDF document text
    • http://zedanipon.iblogger.org/jovapifari.pdfIn PDF document text
    • http://paselon.getenjoyment.net/87834674611.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/eKDtAie/88051403826.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/vurifaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/tokotuxajif/wBXljhu/ecruteak_city_gym_pokemon_silver.pdfIn PDF document text
    • http://afracheat1.xyz/javoxigaxepaxelupajafal64346.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/radio_shack_scanner_mods.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/ijjheig/galaxy_shooter_falcon_squad_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jisijuvod.myartsonline.com/mental_status_examination_form_free_download.pdfIn PDF document text
    • http://xepolowamozuxan.rf.gd/folenuponow.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/yo_yo_ma_fort_worth.pdfIn PDF document text
    • http://putawipomow.rf.gd/32192849271.pdfIn PDF document text
    • http://mubidixosi.epizy.com/55555385175.pdfIn PDF document text
    • http://diwuvugu.epizy.com/xekelelobamamebi.pdfIn PDF document text
    • http://gisoduriri.rf.gd/bluedio_turbine_3_manual.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_off0000dfdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDC 5300 bytes
SHA-256: d94142d329bc7ac647537f7979cc29ea5192d416ff257898ff0119a28966e1fe
font_01_sfnt_off0000f1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C2 10452 bytes
SHA-256: e37da95bc70afabd90a86a9df76c81676b126bcfb1bd44f9a30d5299379fa0db

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