Malicious PDF — malware analysis report

Static analysis result for SHA-256 0710c4a61114bee5…

MALICIOUS

PDF

73.7 KB Created: 2021-05-03 13:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 64a12dac79429cd15163551f416c269c SHA-1: 04387099378adc02c95d563e1df198edeb6f382b SHA-256: 0710c4a61114bee5de8480f110db5d8d1731701a750c0f056e068769b37ed15a
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically appearing as a search result for 'watch american gods season 1 episode 2'. This lure is combined with heuristics indicating a link farm on disposable hosting, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead the user to a malicious site via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=watch+american+gods+season+1+episode+2 PDF link annotation
    • http://peluxuba.sportsontheweb.net/vaxijadinukajotovo.pdfIn PDF document text
    • http://dresdenpharma.ru/washer_repairman_near_medzju0.pdfIn PDF document text
    • http://lyudi23.ru/ernhrungsplan_anabole_ditjg8ka.pdfIn PDF document text
    • http://idealicacolumbia.site/dikitekeguteregaguturanenh7dpc.pdfIn PDF document text
    • http://kadanijojabuf.mywebcommunity.org/hirohiko_araki_book.pdfIn PDF document text
    • http://onlajn-kassa.ru/woods_remote_control_transmitterawtq7.pdfIn PDF document text
    • http://nigodofifulo.scienceontheweb.net/furinubufad.pdfIn PDF document text
    • http://zuxekagapefe.mygamesonline.org/charmglow_gas_grill_3_burner.pdfIn PDF document text
    • http://tonukavugu.mygamesonline.org/autometrica_marzo_2020.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/blackjack_strategy_card_printableezex9.pdfIn PDF document text
    • https://mabedokuk.weebly.com/uploads/1/3/4/5/134582143/552ba350b0.pdfIn PDF document text
    • https://vulajavup.weebly.com/uploads/1/3/4/6/134683256/zuxagunaxatete-redokezuza.pdfIn PDF document text
    • http://am-sound.ru/fesifapojepurigogozigxtxuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dafukip.myartsonline.com/ocean_of_books.pdfIn PDF document text
    • http://gumubagigafaj.rf.gd/freightliner_rv_chassis_service_manual.pdfIn PDF document text
    • http://magotabitujotu.rf.gd/buwodegamiladim.pdfIn PDF document text
    • http://zapiwolatuw.rf.gd/does_ps5_have_120fps.pdfIn PDF document text
    • http://saxarivoje.onlinewebshop.net/xatokarizam.pdfIn PDF document text
    • http://zogutofarori.epizy.com/dozedulixazokos.pdfIn PDF document text
    • http://pidawuz.epizy.com/aikens_artifact_game.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_off0000e2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AC 5652 bytes
SHA-256: 42e5f55576b82494ec69aab056bf3162b83f627f3ce09b168358305f451b6a80
font_01_sfnt_off0000f5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CB 10716 bytes
SHA-256: 34fa3a9923d03c3b18ad358b45b403369634e427a80d085a8c7d8d36f2477a56

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