Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f968726096181e…

MALICIOUS

PDF

79.0 KB Created: 2021-02-27 18:06:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3c351066cb1e8dd6021f7cf43fe988f2 SHA-1: 500ae7fdae6e514e54997ed2cdb8b700b6601b1f SHA-256: c6f968726096181e62259127e60b0e7b43feee8ead2eb1fb61cee85b23d6caa3
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through a deceptive link, aligning with spearphishing tactics.

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://maypoin.ru/strik?utm_term=kobalt+8+gallon+air+compressor+lowes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413973/normal_5fcb4ab65aad0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_6037e5328722b.pdfIn PDF document text
    • https://cdn.sqhk.co/lulaxujik/YWNEdrj/64359743796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488592/normal_6033799fa9f67.pdfIn PDF document text
    • https://tedozumezefa.weebly.com/uploads/1/3/2/7/132740670/mewipi-jovugedataf.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/egiijCU/8526591297.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/todasud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_5fd2ed065cf38.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/ifZ27gf/45834881201.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487423/normal_5fc94dabe5b29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forojiwimudobo.atwebpages.com/how_to_get_hp_envy_printer_back_online.pdfIn PDF document text
    • http://gariravufur.epizy.com/vetomamovukagunak.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/47881906192.pdfIn PDF document text
    • http://woxepakaj.epizy.com/74619400398.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_off0000f646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 5648 bytes
SHA-256: 7a6ba12573f52a320fce730988eae1f88844205ca9d1d2a8cd06a447ec0caeff
font_01_sfnt_off00010978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10978 11016 bytes
SHA-256: 7627027d03bb77d5b31b1228eaa53c482c9ef430a26abb814f54c9f76d344c0d

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