Malicious PDF — malware analysis report

Static analysis result for SHA-256 631b037e1dacca08…

MALICIOUS

PDF

62.1 KB Created: 2020-11-25 07:28:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 791ebf301ff22ac02ca57381729af238 SHA-1: 9d4538c23621537f30d7ae20edebd4c7b018fa8b SHA-256: 631b037e1dacca08d9e0b8f5c38102ecd862ce9b1fa9f2cb2316950695f2cea3
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=indeed+data+entry+specialist PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405945/normal_5f9707856df8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5fa085ee183a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_5fab569ee1c7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450154/normal_5fa03df4f416a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f8b5d533ae0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5f93239e73a14.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/98bd1a04-06e1-4027-b5ea-3f91cae9ae3f/30224766788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b27cd9c-0e67-411f-ad0f-a95ba7b77d7d/gofesasimepuvonuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/282a57f2-5fae-42c3-96e5-9bfe634e5074/tanixevazura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8de3e2-d1f6-4673-bb84-ebf972a67cf7/jofuvukelasunigupakot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/281bba23-fe30-40f7-bb4d-0900ba5a1822/33802210131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a386d445-2136-424c-8b9d-048b7afb85f1/mettre_une_image_en_filigrane_powerp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2baad5c0-e777-4de6-8c67-7f22de8df2d9/kaxarewovudukosagalir.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_off0000b6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B2 5108 bytes
SHA-256: 128d2d421ae32eabdd6b0628b92afe2a1196a7a5ad78c20f947507456081fb66
font_01_sfnt_off0000c827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC827 10360 bytes
SHA-256: 58845c9c8988861fa375eeaf342fd720232e3bab75ea2fc437edd372b46b4453

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