Malicious PDF — malware analysis report

Static analysis result for SHA-256 78703c8643e4f94b…

MALICIOUS

PDF

73.8 KB Created: 2020-11-19 08:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cb3c4d3a9cc8334e0daed26082a53361 SHA-1: bc9ef3219130ea155f7746d2cc75a106177f11c2 SHA-256: 78703c8643e4f94b7d81ea1c867ab58504b2c78d5090aec40c0e6687e5ad9db3
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector, identified by multiple heuristics including 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'ML_NYX_PDF_MALICIOUS'. The ClamAV detection further confirms its malicious nature. The embedded URL likely serves as a lure to download a second-stage payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/123?utm_term=rhodoks+vs+nords In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5f8e338571900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405929/normal_5f93f064c7b2c.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/d25ee762-593f-4591-8437-a6c1524232eb/33483992490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/496f5c56-d3d2-4bb9-bf0a-d739d79e2750/87_jeep_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ad1b61-7b78-4048-bdcc-198f8441ea49/pofup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf191e0-f5ab-4cb9-be73-da2c2f6cafc0/mage_the_ascension_revised.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/tekijoviren.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/jiturilabiponupefipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4578913-96cb-4b48-8e8b-fc34d9117b26/48409670337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092d9741-dfce-4ede-8335-a945481296e3/7420045791.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_off0000e461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE461 4804 bytes
SHA-256: bd8e25b7cef9666ff7c947a0a648937315ef96cdb208e9c036d2f1e187977d8c
font_01_sfnt_off0000f4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B6 11144 bytes
SHA-256: 2395d05ae895c14e6cee697f3115a416827ad4219830abef3c355e6de7a054ed

Open this report in the interactive analyzer, or submit your own file for analysis.