Malicious PDF — malware analysis report

Static analysis result for SHA-256 69cb319efdd56466…

MALICIOUS

PDF

66.1 KB Created: 2021-02-21 10:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 708e3a7cb83ecbc69e8be5eb0913d7d2 SHA-1: 0263d6922f6057a617a81ec598dfe3746a896f41 SHA-256: 69cb319efdd56466bbe824bdb54da0252744e09aa291fcba498dbe56781c3ca6
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links to external resources, many of which appear to be part of a link farm designed to redirect users. One prominent URL, 'https://crophysi.ru/strik?utm_term=nikon+coolpix+l105+lens', is flagged as a malicious redirector. The presence of these links and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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/strik?utm_term=nikon+coolpix+l105+lens In PDF document text
    • https://static.s123-cdn-static.com/uploads/4480397/normal_5ff5e8077da9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403824/normal_602178af6426a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_5fd77ffcc5e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459785/normal_5fd28fda6ee6e.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/7922674.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376857/normal_5ffa9cef8e4ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490950/normal_6017cf5e23c50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_60142cf9683d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_601aa09ff0b1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_5fd846dade02f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380226/normal_5ffe646672b28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_601b46b625d21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468819/normal_60197a1bdfd38.pdfIn PDF document text
    • http://gobigs.space/xanofefuvuminigi40y9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_5fd635be241c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E7 5040 bytes
SHA-256: 8f1e7e6d749dc699e2d9d1b75b3ee9f3ac359fa24b9c51567f30708fd64ec84e
font_01_sfnt_off0000d53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53D 11476 bytes
SHA-256: df6f05811dd1ed280bfd8efc3666d350fd2d10c2534177b0df865180b8e8d377

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