Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c5b1d5211b54f6…

MALICIOUS

PDF

117.1 KB Created: 2021-04-07 13:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1ff6961ed607968875e5b13fe6c994e4 SHA-1: b0412c8a1cd911ddbc03e25f351bfa054931aaab SHA-256: 35c5b1d5211b54f69a21352e8c8e8ed313d371e9ef9e0595660ed2456c9e4709
126 Risk Score

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 0.9988

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://resalured.ru/strik?utm_term=is+there+going+to+be+a+sequel+to+doom+annihilation PDF link annotation
    • http://it50discount.pro/4062779735dtmli.pdfIn PDF document text
    • http://luranowebereni.22web.org/5719304478.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/agile_software_testing.pdfIn PDF document text
    • http://tubipiguposazi.22web.org/caterpillar_320d_parts_manual.pdfIn PDF document text
    • http://menbp.online/kennington_oval_pitch_report_today5fi60.pdfIn PDF document text
    • http://uscreditinquiry.info/bezuligix43p9i.pdfIn PDF document text
    • http://hiziryigit.online/does_tracfone_do_wifi_callingndy3k.pdfIn PDF document text
    • http://vitalia-transports.com/elie_wiesel_night_downloadk56yv.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/popisonigelapeso.pdfIn PDF document text
    • http://podarokinsta365.site/83482065393nn0a6.pdfIn PDF document text
    • http://melowimaz.getenjoyment.net/kezedenewiwanexiv.pdfIn PDF document text
    • http://voiprormul.xyz/wutorbw6h5.pdfIn PDF document text
    • http://movizopolu.medianewsonline.com/cisco_ccna_voice_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tenixebe.epizy.com/lujuzuniluvakeripun.pdfIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_2302d6d30ca3402f86ff527e6ad938c7.pdf?index=trueIn PDF document text
    • http://nevefilin.rf.gd/que_es_destilacin_con_ejemplos.pdfIn PDF document text
    • http://girogabunuxumu.rf.gd/numafibogegejimev.pdfIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_89b55c60e7544a5e9964795f540f1bf9.pdf?index=trueIn PDF document text
    • http://nifubaj.rf.gd/rogikaturepobagaxoviwon.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/78659824825.pdfIn PDF document text
    • http://xidozex.epizy.com/que_es_bioplastico.pdfIn PDF document text
    • http://xesepodine.rf.gd/desh_bhakti_music_ringtone_pagalworld.pdfIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_e74de168203c499ab6cf8de830202ece.pdf?index=trueIn PDF document text
    • http://mugazukadum.onlinewebshop.net/tulja_bhavani_ashtakam.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C1E 5444 bytes
SHA-256: 0488ab4659813bf4f2c1ff2b33661832697a19a0dc0093fe120d13dd66d2f100
font_01_sfnt_off00019e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E65 11584 bytes
SHA-256: 928ebf27108706d46c352dd5be54553a938bb199d9fda1b35a3373224614e10f

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