Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c94eb904aada20…

MALICIOUS

PDF

81.7 KB Created: 2020-11-14 17:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9390d1cf7b2b368e5596c3307dfb7416 SHA-1: d300baee2fa1ea462c04547388dd49f90b5c5f2f SHA-256: 65c94eb904aada20dba133ecf6aad7d3192463f156f176bff56b44c138f5aa8c
156 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 0.9995

Heuristics 5

  • 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.
  • 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=dungeons+and+dragons+basic+set+1977+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f9f15d25ea15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373985/normal_5fac268a10670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468270/normal_5faf608986e0b.pdfIn PDF document text
    • https://ramowukegi.weebly.com/uploads/1/3/4/5/134508735/kudina.pdfIn PDF document text
    • https://geredape.weebly.com/uploads/1/3/4/3/134349068/99e9f463185fff.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/b868bd36301a9.pdfIn PDF document text
    • https://lisefemibumosu.weebly.com/uploads/1/3/4/3/134339955/7d813484.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://uploads.strikinglycdn.com/files/f8c4136c-40a6-4da7-99c6-c09b1a1011ae/xonaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/869b3b89-7a61-43d5-ba68-9a327411717b/80629866682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13875fe1-b58e-4bf4-ab56-62d0d8b9fb9e/mubenogewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7dc7059-3fe6-48f6-a0c1-5accca9f1f93/seladaj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA6 5600 bytes
SHA-256: 92fb3066fa0f472fe29dd04ca606f19033c47d2b0f45674524df5aee929e951b
font_01_sfnt_off0000edcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 10332 bytes
SHA-256: 6533eda1014062846ce79df5db681bde095a45c138eda326e956ceda9150bcf6
font_02_sfnt_off0001115f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115F 17604 bytes
SHA-256: f8787dbda7718fd1a32bce8e945d4ba256b7cd82c0a38e24b7cf6336b1b1c83c
font_03_sfnt_off00012b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B89 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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