Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd38176a284eb29e…

MALICIOUS

PDF

84.2 KB Created: 2021-02-27 03:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 19057b525289154101a2d9f7c8d77d96 SHA-1: 8b55c98be80e16eeaecacab9f8e01382a3108f69 SHA-256: cd38176a284eb29e9a69e01f3c4a6a6bcbe9a2f86b9971fd92a3d7c1ee939942
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, employing a link farm and UTM parameters to redirect users to potentially malicious content. The presence of numerous external links, many pointing to PDF files hosted on various platforms, suggests an attempt to obscure the ultimate destination or to distribute a payload. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or malware distribution document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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://pelibifir.ru/123?utm_term=the+challenger+sales+model+pdf PDF link annotation
    • https://kewisivi.weebly.com/uploads/1/3/2/6/132681156/1786020.pdfIn PDF document text
    • https://fovepupaveveri.weebly.com/uploads/1/3/1/3/131384368/2329172.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fe17f02d47d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495402/normal_5ff40d9e10d2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417137/normal_5fd0e9936fb6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489247/normal_5fe77e5530a95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492257/normal_5fe79350aed92.pdfIn PDF document text
    • https://bezofaxifi.weebly.com/uploads/1/3/1/6/131606652/7606afb785.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453553/normal_5fe0e073717b2.pdfIn PDF document text
    • http://stalekost.site/77876315815c8lwh.pdfIn PDF document text
    • https://xuzubakew.weebly.com/uploads/1/3/0/9/130969304/8962228.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419204/normal_5fdd3f246b0b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lonozote/56829988644.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_off00010966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10966 5516 bytes
SHA-256: 4c02ebe2e385a65a943ae73ddfcd494ab4f3cdc3bf6e8f916e3459de8d222a0f
font_01_sfnt_off00011bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFE 11736 bytes
SHA-256: cd134fa17c38adea088e3fb340116004ad728403cd0e3482121d354f49624a5c

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