Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c40de43ceaf9e1…

MALICIOUS

PDF

120.4 KB Created: 2021-01-12 12:29:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9d4b066156970fdd6ec9adb39f8a1fb3 SHA-1: 77bb8e0c2fbe06b4286e535ec1d3fe76bc9fe22c SHA-256: 20c40de43ceaf9e1f11129bb0bea241dc0e1ab570b78f9f208c360e64336205a
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URL point towards a phishing attack designed to lead users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://trafficel.ru/aws?utm_term=jordan+canonical+form+minimal+polynomial+example PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408587/normal_5fc4672b2a772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420903/normal_5fbba8705c078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373297/normal_5fe44fa3749d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_5fbf430f924d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470029/normal_5fa9d5fbb726b.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/dupaxidoxipowonudil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403823/normal_5fad865fc7d1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5fcf17a7ae9a2.pdfIn PDF document text
    • https://site-1166675.mozfiles.com/files/1166675/barber_shop_near_me_open_sunday.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_5f8e505cebbea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460950/normal_5fb6a8758c86a.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001453c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453C 18124 bytes
SHA-256: 946dad26dc0285413a8831f5350098b2afbcefd0a12ff6662b99dc01d52e672b
font_01_sfnt_off00017b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B3B 5284 bytes
SHA-256: 2122bff261a21f5a37445c48044a17d2c3f6bbd13d95a952e80ddc002fcf6134
font_02_sfnt_off00018d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D31 13692 bytes
SHA-256: 17ae4d404bde974ca4ed0784840d346beb5b59d9b8c32147495ab1459ee0d806
font_03_sfnt_off0001bc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC1B 16808 bytes
SHA-256: eedb48fc2a3314f78244529787342052add6578e165d3b9fc535e38dece5e88b

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