Malicious PDF — malware analysis report

Static analysis result for SHA-256 299d8a3289399de5…

MALICIOUS

PDF

71.3 KB Created: 2021-05-11 20:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fef356fad26230fd3921a9ba2827d6cb SHA-1: 8ccd5531e91246d0a12610736a9b75c9c7399bd5 SHA-256: 299d8a3289399de5882edb99e62fd402f9c8a57c531e05ed637706132f9efa4b
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 0.9997

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://nipisod.ru/strik?utm_term=dish+wally+dvr+hard+drive PDF link annotation
    • http://wugupomovupa.sportsontheweb.net/savoxotez.pdfIn PDF document text
    • http://kakifoliwifeja.iblogger.org/bezixi.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/sitenovigeperojenobiloka.pdfIn PDF document text
    • http://wide-take.top/32771877294u2fce.pdfIn PDF document text
    • http://generalmassage.online/725930670673osns.pdfIn PDF document text
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/4501457.pdfIn PDF document text
    • http://nat-yoga.space/catfish_brasil_2_temporadas4ope.pdfIn PDF document text
    • https://poxigupi.weebly.com/uploads/1/3/1/3/131398264/f9abf8ca9e66.pdfIn PDF document text
    • http://astropsychology.website/tigapunibijugex8yafa.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/anthropological_thought_by_makhan_jha.pdfIn PDF document text
    • http://fijexojor.getenjoyment.net/pesquisa_quantitativa_e_qualitativa_conceito.pdfIn PDF document text
    • https://lijimoxa.weebly.com/uploads/1/3/0/9/130969704/nutawaga.pdfIn PDF document text
    • https://wutadesojijemez.weebly.com/uploads/1/3/4/3/134393937/aad5d1e6378.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/nobixu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_4e20892b8753491ba3703aedda6b2127.pdf?index=trueIn PDF document text
    • http://revogip.epizy.com/57945359353.pdfIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_ad864c6415a24f4489c23382eb5e36d2.pdf?index=trueIn PDF document text
    • http://dukutogesedu.epizy.com/75020127876.pdfIn PDF document text
    • http://dotakilegux.rf.gd/is_the_new_jersey_drivers_test_hard.pdfIn PDF document text
    • http://duwopatovulid.rf.gd/annotated_bibliography_rubric_high_school.pdfIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_cf4cc53f782a451eb5e485f968e87ca7.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_off0000d961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD961 5164 bytes
SHA-256: 1f00e0d02f39931249cea0458b474d89c9d1b807ff9b02ec1f11c4b0f050972c
font_01_sfnt_off0000eb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB10 10856 bytes
SHA-256: 0044e5c06d2c6ed1da3ef868ab803c067f5e78790f95c1db210de37b870929c5

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