Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fee4c8296a62b44…

MALICIOUS

PDF

92.5 KB Created: 2020-11-19 01:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3c96a137a26757b1c40d62970679515a SHA-1: 962e83b8807adad237835b427352917e1409266f SHA-256: 2fee4c8296a62b446e29c1cdfb937daf360f8646b2d923e03c2e1cbadb03f9fc
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://trafftec.ru/strik?utm_term=dicionario+yoruba+portugues+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5fa267d7d1d3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414152/normal_5f99649e49600.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/xejoxiz.pdfIn PDF document text
    • https://xogazusuguse.weebly.com/uploads/1/3/4/4/134479670/1178942f8.pdfIn PDF document text
    • https://buzowoxeferoxo.weebly.com/uploads/1/3/4/6/134662453/walalija-zamabome-dapufutukadaw-zuxirin.pdfIn PDF document text
    • https://kevujabuguve.weebly.com/uploads/1/3/4/7/134745112/tubegizega_fezatitu_xupidagu_naxosolinuzixid.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/sulamufetivekaxidut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452861/normal_5fb52cb1d55bf.pdfIn PDF document text
    • https://gumomamomav.weebly.com/uploads/1/3/1/3/131398069/nolizejirofa-naberopaxajebu-pazevo-kipexaxiteji.pdfIn PDF document text
    • https://nagigezivozitos.weebly.com/uploads/1/3/4/3/134340852/kezape.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cb43916-f975-4652-bf0f-ef63cfecc158/ditoperinusevuvafezera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0df4af9b-5f98-4b9c-9122-7f415872a35c/19078699052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2311dff9-a8b7-4508-ae9a-914694eeba5b/7414216548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/995a565c-a2b4-45eb-9d0e-34144db498eb/pinewood_computer_core_meltdown_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2207c19-e670-41bd-bb5f-de33425e0169/waguvivadomanefanixomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7d2229c-3adc-4abc-bb2f-ae3513c78abc/24391345561.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_off000129e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E9 5532 bytes
SHA-256: 6879fc419631e10395bb3192fb5c8e7dcf2f73024a81847d8948bfd266ec6ad6
font_01_sfnt_off00013cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD3 13348 bytes
SHA-256: 2d8818b2791b83eeebd14f38911e5e1c4efe63446501b30a16addc967d951529

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