Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09fee42ca71c05f…

MALICIOUS

PDF

156.3 KB Created: 2021-04-01 00:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6b791c2e0c998e76732c49710b7a633a SHA-1: 75c4dc8d1072301f7abff81a9894ca789f6dfa7d SHA-256: b09fee42ca71c05f161d05acf847173650d529e6abe32856685c3a974ee1d5f5
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://botokaw.ru/123?utm_term=manual+de+andrologia+veterinaria PDF link annotation
    • http://loduwij.scienceontheweb.net/gezopemovorobe.pdfIn PDF document text
    • https://pipizodo.weebly.com/uploads/1/3/4/3/134352326/xebejurep-vuzefun-mibozemexujek.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/awg_wire_gauge.pdfIn PDF document text
    • http://shop-kid-toys.online/59912154988m726x.pdfIn PDF document text
    • http://dwatches.site/30075042795y3kqo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466366/normal_604674ce4da75.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/toxagexozutedobegijeru.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/check_list_auditoria_interna_iso_9001.pdfIn PDF document text
    • https://gumewixolasadaz.weebly.com/uploads/1/3/4/6/134659592/jiwen.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/58779085537.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484623/normal_5ff3b3b7571b6.pdfIn PDF document text
    • https://bivesazi.weebly.com/uploads/1/3/4/6/134652180/tedixikapitalisiwe.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/62429403874.pdfIn PDF document text
    • http://gifavojam.scienceontheweb.net/accepted_50_successful_college_admission_essays.pdfIn PDF document text
    • http://debuged.mywebcommunity.org/power_amplifier_classification.pdfIn PDF document text
    • http://cethq.xyz/kenwood_ddx9702s_pricesoq6z.pdfIn PDF document text
    • https://japarikadag.weebly.com/uploads/1/3/4/1/134108792/dufitakekozax-fovamupogato-mibofu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0002242d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2242D 4880 bytes
SHA-256: 1fa9e6936bef83c1f79f9a63a78d76f41624dc83d9625eeecbd25352505f1d18
font_01_sfnt_off000234e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x234E9 14804 bytes
SHA-256: 249acfe772fac5c944f96e27bc05b1d2c31c6a2df9700cdf8245b3f8948c39af

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