Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff16ee6d71413c5…

MALICIOUS

PDF

69.9 KB Created: 2021-03-15 23:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f675024a52ff2e39a869fa0fefc4b1cd SHA-1: cff5489c571f9115a59729ecdc88c82f5bae7eb4 SHA-256: 6ff16ee6d71413c5e67935ace71b9479dde2bdb920bb707bb83502e8018a597f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://vilenefex.ru/strik?utm_term=blodgett+convection+oven+pilot+light PDF link annotation
    • http://mixutadumekaje.mypressonline.com/best_book_to_learn_python_coding.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/63683912632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416332/normal_5fd2425c1be3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_603c3b25ceb00.pdfIn PDF document text
    • http://9gusevshop.space/kabumoz8tzz.pdfIn PDF document text
    • http://vomidujoma.scienceontheweb.net/pdf_topology_networking.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/57762596550gnpi9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453537/normal_5fc6cc6ba054e.pdfIn PDF document text
    • http://smartycredit.info/15008966333yos60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/how_does_the_uk_judicial_system_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9b97a8-f0fb-431e-98dc-4d50abb02d6f/bedagis.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/xelurokozotugune.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/ratowefugemomug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259459aa-8dba-4cd6-9f42-8b011b715417/pemmican_make_sentence.pdfIn PDF document text
    • https://2b12d24f-0c9a-4a32-b427-430aba395f0c.filesusr.com/ugd/6cfe90_ef3e365d32d047e99a5ebe01e2bfbfa8.pdf?index=trueIn PDF document text
    • http://buzanuziti.myartsonline.com/como_terminar_um_relacionamento_com_um_narcisista.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_748cf20ea7474bb68137939d0a75422f.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_off0000d5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BF 4960 bytes
SHA-256: f70a7889ff9a605cc3fdfdc87d871357a1865eb3c2313c43002d404613fa4806
font_01_sfnt_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 10600 bytes
SHA-256: d5c43e9cf8bd861666e4cdfc118e85cd2146575441059e3bbaae5c3aa5b5f2f2

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