Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e83cf05acd87a5…

MALICIOUS

PDF

68.2 KB Created: 2021-02-16 07:18:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8a2e1500ab8d25ffd696171609c6dd32 SHA-1: ffae0dd72a94e99b2b1bcd4fb2484cfa519f0cb6 SHA-256: 81e83cf05acd87a52d97f280fa8c7bb160d465f0145bbf89219004d769c5fe66
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/123?utm_term=sanyo+tv+reset+to+factory+settings PDF link annotation
    • http://hookup157.fun/button_onclicklistener_androidnq2ik.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/uhietFx/horizon_zero_dawn_forbidden_west_trailer.pdfIn PDF document text
    • https://jubigugatuse.weebly.com/uploads/1/3/0/7/130775741/setuzobefalawa-kisozoroto.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/jcThfKr/top_90_s_country_music_hits.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/jUhfihr/rimijasibakofi.pdfIn PDF document text
    • http://businessoutsourcing.info/cadena_trofica_esta_formada_pork9jrx.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/5hjhc7v/43184533124.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/geggjj4/kopavegulukexamibinikawe.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/9562723272mvxkf.pdfIn PDF document text
    • https://cdn.sqhk.co/goponebegor/iWNjkge/82124707852.pdfIn PDF document text
    • https://cdn.sqhk.co/bozadukopufu/dBhhicD/atomic_command_fallout_76.pdfIn PDF document text
    • http://muzoc.xyz/playstation_vr_gladiator_gamesxr63.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://larilelux.epizy.com/92899875849.pdfIn PDF document text
    • http://newotev.rf.gd/9359057350.pdfIn PDF document text
    • http://wobemiko.epizy.com/bajirao_mastani_movie_free_300mb.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_off0000ced7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED7 5284 bytes
SHA-256: c15af35a925c7dca8913e7bf3158fd89527bd05ede89b1f303d6abef2c909ae3
font_01_sfnt_off0000e0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F0 10256 bytes
SHA-256: 1a34b9f6e045d0e1c7ae7d1b308a505a995f25c71a8469eb099f28b44084f23a