Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce4769bc14bb43d…

MALICIOUS

PDF

86.0 KB Created: 2021-03-18 15:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d4b9bb486696d4540e8c0e040b046a94 SHA-1: 32f90238931619d3b4f0c7e31c9845a7893cb8cf SHA-256: 3ce4769bc14bb43d773a7b870002aea9f62af4b64dd33e2883b7311ecfb2a9e9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://druttle.ru/strik?utm_term=how+to+drain+my+fisher+and+paykel+dishwasher PDF link annotation
    • http://afterdealer.pro/zazozodavenovinepexonamx29xm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501028/normal_6019db5b5a35e.pdfIn PDF document text
    • http://spiritstudio.ru/roman_achievements_in_engineeringygi99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496216/normal_5fc7e048de089.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416131/normal_5fc9f2293752c.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/fallout_4_best_graphics_mods_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5fd1b01b76683.pdfIn PDF document text
    • http://kvrovk.xyz/descargar_whatsapp_plus_apk_softonic83aik.pdfIn PDF document text
    • http://how2clever.com/zogenifurakarukbxobt.pdfIn PDF document text
    • http://bufo.online/financial_risk_management_mba_notes0va1b.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/18679134770.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/vivitar_bluetooth_smart_speaker_price.pdfIn PDF document text
    • http://sozimaxetupow.mywebcommunity.org/why_cultural_mapping_is_important.pdfIn PDF document text
    • http://mosdendy.store/unity_webgl_games_onlinelihqe.pdfIn PDF document text
    • http://cherrypimp.online/ruxaxixelozesotenore5nk.pdfIn PDF document text
    • http://probnik1313.tech/chingamasam_dj_remix_song44vs1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_7871a1f1dd87439b9684b1370e185d48.pdf?index=trueIn PDF document text
    • https://1747caf2-50c5-4ace-8f30-8d3f4e2f7d49.filesusr.com/ugd/017962_7bb159935c2f471da3002d7e946692c6.pdf?index=trueIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_1df966bf93cd4b2db7aada923dd8d615.pdf?index=trueIn PDF document text
    • https://1b6cb5a1-0716-4815-a0ff-d4d806105337.filesusr.com/ugd/94e5ef_8c40edf247ae4618b9c1bafe2e058361.pdf?index=trueIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_015d6f55ec45453faa3948bec28a01a6.pdf?index=trueIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_bc46fb5777e5441cb3edc575eac4719f.pdf?index=trueIn 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_off00011183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11183 5500 bytes
SHA-256: 3bcd61bfd00e7733d1873edbea95eaa0df125f97e7682af7fda5a02c9869d29e
font_01_sfnt_off00012423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12423 11220 bytes
SHA-256: 1416cefbf623f623f291f391cf05de6ed75e59d2a590f6f9054f4be4425d31a5

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