Malicious PDF — malware analysis report

Static analysis result for SHA-256 8940c75aa015408d…

MALICIOUS

PDF

72.3 KB Created: 2021-03-03 05:16:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 09222de086def549e724bb904f60d2bb SHA-1: bd92a260e4521598b2f95aeedadf925838c57cb1 SHA-256: 8940c75aa015408d19ce019136c5c5e14dcdbe7f9de845bf0c6e6c8aa97a4f3c
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is also flagged by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam related to the 'Cyberpunk 2077' keyword found in the document body. No scripts were extracted, but the presence of external links suggests a redirection to a malicious site.

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://resalured.ru/award?keyword=cyberpunk+2077+ps5+pre+order+canada PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403407/normal_5fff457181490.pdfIn PDF document text
    • http://filanion.online/filter_excel_data_into_multiple_sheets4tg72.pdfIn PDF document text
    • http://ruwegekugite.22web.org/dudijopafowazisasofefev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_603133b471b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402478/normal_600d9eff4da22.pdfIn PDF document text
    • http://italdom.fun/wekigolekivuvuxrlfij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417220/normal_603e9d08a34be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421205/normal_6038c80dbfc16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_600a58f9ce720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447915/normal_6014665d6b3c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kunuzozadaza.epizy.com/2009_chevy_impala_transmission_replacement_cost.pdfIn PDF document text
    • http://netozovozuze.rf.gd/xuwel.pdfIn PDF document text
    • http://zufabilo.rf.gd/73183204726.pdfIn PDF document text
    • http://jojerigexorow.epizy.com/62690683494.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_off0000dc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC87 5724 bytes
SHA-256: 9989a86448e213c9fee2557ad5fa2e0d2dc3e36441bb3f98dc1f824174adfc6e
font_01_sfnt_off0000f01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01D 10464 bytes
SHA-256: 35a4290f7bf1965c59395fa6b4ecfc4b9f70fa7945d9c9bf63d2c3c91b9fce74

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