Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bb8a277f8a66b1…

MALICIOUS

PDF

81.8 KB Created: 2021-03-27 21:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e1c4488e9924c9ed3d9ffe4c385b139d SHA-1: 152296f2b42e284b1dde143be45333eec88ae396 SHA-256: 60bb8a277f8a66b117e62b45594c113fc30d4912e1a81c2223e3f659efae9ea5
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/aws?utm_term=m-audio+oxygen+49+mkiv+logic+pro+x PDF link annotation
    • http://remont-kvartir-otzyvy.moscow/27265653244x0zym.pdfIn PDF document text
    • http://kataeta.club/fannie_freddie_underwriting_guidelinesegndr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421062/normal_5ffd672c05f7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403407/normal_5fc90787c4a3c.pdfIn PDF document text
    • http://tetoxukipim.getenjoyment.net/7844496892.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/87880649894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488346/normal_6010c69b24df7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475570/normal_602ce57ddc5ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_603d128324169.pdfIn PDF document text
    • http://axacheat4.xyz/musufinejeduj3snm2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426967/normal_602f70298d19d.pdfIn PDF document text
    • http://idealslimitaly.site/17397510704jksfw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_7d9fc7a75dbb4e7dab320ca2b1927fb9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0a7ea2-d889-44b3-867c-9ce2b7b35362/craftsman_electric_leaf_blower_gutter_attachment.pdfIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_404621c755b54851b8406ad5ea240747.pdf?index=trueIn PDF document text
    • https://9b2ef95a-2922-47a0-9c22-e01f3107c538.filesusr.com/ugd/c345b0_2b549933026e41398f0f65de33da8ba8.pdf?index=trueIn PDF document text
    • http://zesugipove.onlinewebshop.net/canyon_de_chelly_national_monument_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49615f65-0b01-47b4-9b57-0d5ea95ca4e2/matthew_hussey_text_him_first.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f58a6960-d4e1-4072-a2b0-30455fb32d60/risoginitatuz.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_off0000f420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF420 5788 bytes
SHA-256: e3d556a78520567fdcf2030e89c7b016d689eca816b47692ec9db6853ee909ff
font_01_sfnt_off000107f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F6 21328 bytes
SHA-256: ec3ae2f69e6fe8035797b16bd0fc23051b1374e5c7ff34a0aaf02e6897fe8ae4

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