Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c4cea99899c2e0…

MALICIOUS

PDF

79.2 KB Created: 2021-04-14 10:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 67b3d47c33ae1cc44f2380c7210562cc SHA-1: da15a4260394cf6e5e2bab155b3738a8693e446c SHA-256: c6c4cea99899c2e0c9c671de850f3b7848ad71fe0e83c723ddd5f2a5974d2fd2
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=how+to+change+hoop+size+on+brother+se400 PDF link annotation
    • http://scandisvet.ru/fafubekuzopupuxanigecwft.pdfIn PDF document text
    • http://spainwow.pro/ninivuknndt3.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/ahjigmU/gewimamo.pdfIn PDF document text
    • http://chelamela.org/xovojubabuxelapifibodg0al0.pdfIn PDF document text
    • http://nashremont.site/6882720989614c4k.pdfIn PDF document text
    • http://ejqy.com/1804696230if66k.pdfIn PDF document text
    • http://usesalle.xyz/tim_ferriss_bookshelftf74h.pdfIn PDF document text
    • http://freshka.fun/spiderwick_chronicles_arthur_spiderwick_s_field_guideuact2.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/shaDtif/green_papaya_waltham_hours.pdfIn PDF document text
    • http://muvavezupat.22web.org/sevawozipadanip.pdfIn PDF document text
    • http://lojisaka.22web.org/drawing_lewis_structures_practice_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_ed56d649de304d4e88e42ab256e5b00d.pdf?index=trueIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_4eb75a89c74f4db7bdef921397c301ce.pdf?index=trueIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_330ac595c26649a4b2d47ba2baf53c2b.pdf?index=trueIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_1b8b5f3f3e5f4a509bf407c32a4c9585.pdf?index=trueIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_ad63a19ce4d04c319f2b9cd5bf1b0690.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_7ae73f4bdfec40eb9051524a0fffe080.pdf?index=trueIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_55248904cb114010a44c235acc6ae979.pdf?index=trueIn PDF document text
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_95003bdf2fe14c3a9859519d5ab1f09c.pdf?index=trueIn PDF document text
    • http://wosekamilos.epizy.com/nuwujo.pdfIn PDF document text
    • https://f5711562-8a0d-4a87-802d-80b49b7e2cae.filesusr.com/ugd/455f95_b5461ad790e1425e93118c2419f90670.pdf?index=trueIn 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_off0000f348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 5636 bytes
SHA-256: 1acf9a012f8433a6edeed7b5a3886a1d2696ef1ee71f4158d626de75270b0de8
font_01_sfnt_off00010692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10692 12296 bytes
SHA-256: a0dcf66c591c85742c7381d44d680b98dd4b0649c07df2f52ec437adfb4af5d9

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