Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95447f2b74f2451…

MALICIOUS

PDF

71.1 KB Created: 2020-12-02 10:46:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0ad9fb99ae270902beadd577f5fc0002 SHA-1: dd1dbf224d15ff1031325481a9c9fda3cb581c31 SHA-256: c95447f2b74f2451be1b7a4fd23515f6aebd61a453f1389386d82ed256807f24
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. 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 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/aws?utm_term=commercial+video+maker+software+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f99087431827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f9f40a754d9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_5f994ec816d84.pdfIn PDF document text
    • https://xinomufe.weebly.com/uploads/1/3/4/7/134706409/vudelizoj-ligifabirifixu-jutoninobu-gijol.pdfIn PDF document text
    • https://nudevikitexes.weebly.com/uploads/1/3/4/5/134506517/zokaruxakofuzo_sisamowof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475734/normal_5fab33932213c.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/b35f25c2-7239-43a7-8148-ec8496b23507/43910853663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b24d45-6000-4640-be8e-1aaafecc6233/35162777680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3ce991-35d7-4936-9d25-99718d05f8a9/laket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25b3a54-e46c-46da-8cd9-0f114106b917/y2mate_youtube_download.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD868 5288 bytes
SHA-256: fca409251f2ae46d26c03525cf6e6d30968533ca5086e32098edb20290f07126
font_01_sfnt_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 11072 bytes
SHA-256: 125301a6ae9f411b984c685bfba704711e8201f8d197752c782c8a8924fb042e

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