Malicious PDF — malware analysis report

Static analysis result for SHA-256 213f1e9c23ca3d08…

MALICIOUS

PDF

69.7 KB Created: 2021-02-24 06:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c08ebbcc34a7687979e16d8ea49454ec SHA-1: 105019431542b69241ee3b87e0d74b29d97b126a SHA-256: 213f1e9c23ca3d088206c71d087e6b47256ec4a61c135660975efbbb5bd24b51
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with techniques used to host malicious content or redirect to phishing sites.

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 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=plantronics+backbeat+500+vs+505
    • https://cdn.sqhk.co/munuluxel/iiihCja/83302412843.pdf
    • http://damita.fun/the_story_of_babar_by_jean_de_brunhoffhni4h.pdf
    • https://cdn.sqhk.co/moxibusas/jgjasMH/3170572618.pdf
    • http://pl50off.info/adding_and_subtracting_fractions_practicek31sj.pdf
    • http://mattelipsticks.site/mavomapimodogemexezofa3w06v.pdf
    • http://remontlegko.info/kotowepawoxircqba.pdf
    • http://tafuvomilo.22web.org/buvanorovavopefujowunigo.pdf
    • http://aduo5.online/46539154590w7li3.pdf
    • http://ryursew.space/foworibiqqyc.pdf
    • http://paxibokojusaduw.22web.org/simile_and_metaphor_worksheet_8th_grade.pdf
    • http://maddot.space/radio_flyer_wagon_instructionsmd3vm.pdf
    • https://cdn.sqhk.co/waxipefimafa/Xljdjf6/service_project_ideas_for_nhs.pdf
    • http://mmmmmme.space/3690102317kwmtl.pdf
    • https://bopelesi.weebly.com/uploads/1/3/0/8/130874615/nukozedunekego_dofubudem.pdf
    • http://coloradocustomelectric.com/scary_horror_sounds3iku9.pdf
    • https://fanolukexepafo.weebly.com/uploads/1/3/0/9/130969893/9951592.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://luvoxijamubisur.rf.gd/jiu_jitsu_moves_youtube.pdf
    • http://vezelivami.rf.gd/microsoft_outlook_for_windows_7.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d228.bin
83232202af08c27cb6bc8fd685a40fb7da29a230ae9c9dfbc1a659e9e7e22103		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD228 5324 bytes
font_01_sfnt_off0000e45b.bin
e997ac74e17521c26c865152034890c8156ccaa0c1c54506c65c6a77f411445d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE45B 11192 bytes

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