Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93d131d88267bea…

MALICIOUS

PDF

81.0 KB Created: 2021-01-30 18:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a96d6907faee2ce2344746a127b71d5f SHA-1: a8f984ade8671b0e0d5395bc99f6c2b7cd3c60e9 SHA-256: f93d131d88267bea9355e14b42be60bfaa3e3f2d25dfc1f3d21fbaeaf2db72cb
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/123?utm_term=duplicolor+bed+armor+vs+herculiner'. This URL is likely used as part of a phishing lure, aiming to direct users to a malicious site. The ML classifier and ClamAV detection further confirm the malicious nature of the PDF, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/123?utm_term=duplicolor+bed+armor+vs+herculiner In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416327/normal_5fd1a4e737fb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447877/normal_5ff26e8c69782.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490001/normal_5ffcac581694d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480170/normal_600c8c12d8a05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444864/normal_5fedf3d9a1156.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471467/normal_5fd399ba5622e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468819/normal_5fd80628e2d23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450514/normal_60097f349e054.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445106/normal_5ff9528e89e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464302/normal_600df9ee66993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382961/normal_600c08d85c367.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/dejazuvorira/jakowilagutipevisujaw.pdfIn PDF document text
    • http://wulukexererumus.epizy.com/best_website_templates_2019_bootstrap.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/33611701311.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/18166083849.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/siwoxidaditurux.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/worship_motion_background_free.pdfIn PDF document text
    • http://zitejilid.epizy.com/60398865596.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_off0000ffcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCB 5512 bytes
SHA-256: 6b6fdca4f8227714397baab3a5b22db44cc780e104f0f289d8d8605d131393f1
font_01_sfnt_off00011258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 10528 bytes
SHA-256: 6e23ab6814b505892baa35a527c29c78e3e25eb4b4535895e62ddeb1924fa569

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