Malicious PDF — malware analysis report

Static analysis result for SHA-256 921051c7268e97ee…

MALICIOUS

PDF

74.9 KB Created: 2021-04-12 17:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d72508fccc793a535ef895e57e17a2cc SHA-1: cb26493e3cc640a0a89afaa79f4ac60b84b0ea2b SHA-256: 921051c7268e97eeade3c76d1291b58dc4fb2efc20cc709d0874e8ce9f8c382d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to network device setup.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=pace+modem+router+setup+diagram PDF link annotation
    • http://irisca.online/why_does_my_kindle_not_turn_onec6e1.pdfIn PDF document text
    • http://kawlites.online/gimefi180qx.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/ibZRaif/zefijigabijemaxojevum.pdfIn PDF document text
    • http://todayshop.website/11476157343g8amj.pdfIn PDF document text
    • http://pazolozul.mypressonline.com/kitazasafugez.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/xopetikixumoba.pdfIn PDF document text
    • https://cdn.sqhk.co/bulegumu/Vjgxiah/53882500569.pdfIn PDF document text
    • http://melomone.scienceontheweb.net/gimemusonejuxuwejeveva.pdfIn PDF document text
    • http://wulixiv.sportsontheweb.net/plaquetas_bajas_en_perros.pdfIn PDF document text
    • https://cdn.sqhk.co/jufulezamuko/wgViigi/63058919990.pdfIn PDF document text
    • http://xinuvaro.sportsontheweb.net/lexique_des_termes_maritimes.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/hu1GOhf/ninja_go_master_of_spinjitzu_game.pdfIn PDF document text
    • http://wivikaxebox.medianewsonline.com/musico_abandonado_ferido_e_esquecido.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://deutschebank-meine.com/best_free_daw_for_windows_10idg7j.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/JifyN8G/nezawezad.pdfIn PDF document text
    • https://cdn.sqhk.co/bafujifi/m3UH5QU/couples_therapy_progress_note_template.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/pzRggzv/19744819797.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joxumokuri.epizy.com/62838805570.pdfIn PDF document text
    • http://viputuv.rf.gd/sisexugesujemi.pdfIn PDF document text
    • http://kubosew.epizy.com/number_theory_solution.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_off0000e67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67C 5364 bytes
SHA-256: ac856842c67bb23766b80a41087eb79b66b48a8899f8edeca7cf16930e1c4171
font_01_sfnt_off0000f8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 10672 bytes
SHA-256: ec8ff60c6882406cff5372131be7e4767e9cad2f6168a3204d9d8a1609125b51

Open this report in the interactive analyzer, or submit your own file for analysis.