Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3dce7a94d69a8ec…

MALICIOUS

PDF

78.0 KB Created: 2021-03-14 17:46:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 83b9e998df2fb4eea8b41222eeb3f7ad SHA-1: 5b31d2ebfe3cc1dfaec4d87de4f48dcff3d327e2 SHA-256: c3dce7a94d69a8ec8fe1def16152904eb62271dce43300d23dec074a9ef200db
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 0.9996

Heuristics 6

  • 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 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://soxebez.ru/wix?keyword=vlc+tugger+buy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501027/normal_5fe8eb6d47cdd.pdfIn PDF document text
    • http://voxemukam.22web.org/99571261349.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/0gcqjaT/5782734705.pdfIn PDF document text
    • http://opticsystem.website/wave_tom_jobim_sheet_musicmr5zq.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/epheQij/2337160062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387427/normal_5fd739ba4ba7d.pdfIn PDF document text
    • http://euromarket.pro/55259241048vmdge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_5fea0aa11db12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414494/normal_600741a74d4c0.pdfIn PDF document text
    • http://evatopshop.xyz/kazatasogiduvanabazisezemaxwlz.pdfIn PDF document text
    • http://filfex.ru/el_guardian_del_centeno_peliculacjjq2.pdfIn PDF document text
    • http://bigswinner.space/xuramewuzorubeck0n9.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/iWcJcjb/hockey_training_equipment_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_604ae78b7aba3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_5fd7f31f91f1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_5fd696133570f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_cd7471c75e4c4793b3e282347d66119e.pdf?index=trueIn PDF document text
    • http://todonoto.epizy.com/vazeletelukadarasiso.pdfIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_e0a1c5c8ef804d238418fea80193bed7.pdf?index=trueIn PDF document text
    • https://c9ecad83-e70d-4e71-84d8-0086c45344aa.filesusr.com/ugd/01a317_5347415f4ee745a3afd7b80950745b01.pdf?index=trueIn PDF document text
    • https://7e079b21-6cfc-4bbc-a8af-001f4930a7f2.filesusr.com/ugd/f66805_ffb1e595f9a74c8c949d826623677a44.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AD 4404 bytes
SHA-256: 1556838a0ab69f823fd5fdafcfc23ecaece3a9bee7c733b4e9cc578c785d06f6
font_01_sfnt_off0000f5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 11612 bytes
SHA-256: d1d0ed1361d37a52954209140aaaa2c13bf9fbc4ee01007b814428951b63279e
font_02_sfnt_off00011cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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