Malicious PDF — malware analysis report

Static analysis result for SHA-256 9884600078f1bb6e…

MALICIOUS

PDF

88.2 KB Created: 2021-03-27 16:37:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ca06a980e4317788354941008f561b8e SHA-1: 9ebe9502f0c7a624f3329ce44a86529f32ed6ded SHA-256: 9884600078f1bb6e34621390ce6d8ce074beeb7861218270232ef8b731ec41a0
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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://pelibifir.ru/award?keyword=plant+based+bodybuilding+meal+plan+pdf PDF link annotation
    • http://suziterunedoloj.sportsontheweb.net/kubof.pdfIn PDF document text
    • http://vasizazesunof.medianewsonline.com/93209047684.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/jgijTZ9/gugigud.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/gegfSyN/banafagoxikovawok.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/ihgQjgu/cs_driving_parallel_parking.pdfIn PDF document text
    • http://nugawijuxuv.mywebcommunity.org/30898235514.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/aE0wSVN/stickman_fight_dragon_legends_battle_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/jEibpJG/witimotewazaza.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/jix2hfU/kerulorinoj.pdfIn PDF document text
    • https://cdn.sqhk.co/denalivek/iahghap/voxuvane.pdfIn PDF document text
    • https://cdn.sqhk.co/pelebitebi/oib2ih9/55623899221.pdfIn PDF document text
    • http://gujozulogisin.scienceontheweb.net/upsc_assistant_commandant_2020_notification.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/posterior_hip_replacement_precautions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2571d5ef-7130-409a-b87d-c3fd18a83f30.filesusr.com/ugd/71fc55_6644c3cea37043a2aa591205f64163a2.pdf?index=trueIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_99c5b00b6e6c4d299488b53a22f086a8.pdf?index=trueIn PDF document text
    • http://sewewixa.epizy.com/85397756109.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_2572f372b88d46479098754c23c2227b.pdf?index=trueIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_0c04424368a44bc185b299ce70f3b5d7.pdf?index=trueIn PDF document text
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_b9a5edbf6eb847ffa5fbd663afa7809a.pdf?index=trueIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_11e661ffb2f24181b3ef9f1a624dad1d.pdf?index=trueIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_1f72f678bb174863a3b87bb03177e9d1.pdf?index=trueIn PDF document text
    • http://jalasofumikom.rf.gd/apa_manual_7th_edition_introduction.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_off000117a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A4 5508 bytes
SHA-256: 218c1b88cb3e6193c0e0748feee92944625ced6950f63f834988f3d33ee1c5ab
font_01_sfnt_off00012a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A56 11968 bytes
SHA-256: 8c64ad7083c5e95ebdea2d7de619dcaf6db7cec357ab4c6286366ee706ddf038