Malicious PDF — malware analysis report

Static analysis result for SHA-256 854ec4fc890b105b…

MALICIOUS

PDF

81.2 KB Created: 2021-02-16 01:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 607a0e20de675c0bf8a0d3f551c11c6a SHA-1: 9c0112600d11e8f95dfadae41f369a0a801afab9 SHA-256: 854ec4fc890b105b5706cb8343f06cbf33330e6ee82915c9ee2814156785ec83
156 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 0.9998

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 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.
  • 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://baarspo.ru/strik?utm_term=the+city+and+the+city+book+summary PDF link annotation
    • http://saratov.ooo/ariete_coffee_machine_manualzpw0z.pdfIn PDF document text
    • http://hookup754.fun/115887120622aq8j.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/85hgjqB/pocket_rockets_poker_app.pdfIn PDF document text
    • http://bighome.space/cisco_asa_5510_cli_commandsxw90p.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/fajugafijurapasalulju53l.pdfIn PDF document text
    • http://tohld.in/571812025902cvl.pdfIn PDF document text
    • http://cmb-societe.com/game_battleground_s_survivor_mod_apkndnr5.pdfIn PDF document text
    • https://jokiputukalak.weebly.com/uploads/1/3/1/1/131164130/kejakololefododuki.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/nopisilidapugiputakasrfxl.pdfIn PDF document text
    • http://virona.org/80754539570w5mb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mubemutolewe/kokobenasipaj.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/challenge_full_hd_bhojpuri_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/frog_eyed_gecko_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/how_to_calibrate_scotts_speedy_green_3000_spreader.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/concatenate_in_report_expression_cognos.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/best_home_dehumidifiers_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/gizupagobenirixera.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF245 5284 bytes
SHA-256: fb937d004e032eb8267946f3c4f505270e2be43cbc881fbfed822e73a3f63211
font_01_sfnt_off00010401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10401 10952 bytes
SHA-256: 71dd2685b889745f0bdad95836eb55d84a95260d1c10330be18c60c04f9d23b5
font_02_sfnt_off0001294b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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