Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c332ff1d7d97b4c…

MALICIOUS

PDF

84.8 KB Created: 2021-07-02 09:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 26c77ed02fdba9e6deb7abc1506e0a38 SHA-1: 5f482b2fd4365bedb9af365e2fbf77fa5a93e551 SHA-256: 5c332ff1d7d97b4ca69e6698947a13690f0105c63488a23648f8c22f935e34b0
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an external URI and an image lure that redirects to a URL associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing phishing content or a secondary payload. No scripts were extracted, but the PDF structure and embedded URLs point to a common phishing lure.

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
  • 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://synerhu.ru/wb?keyword=saturday%20night%20atlanta%20clubs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387589/normal_5ff63a5f7dd4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_6047c11f8646a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_604ba4c629a42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5fcc92e21ecb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386595/normal_5feb27a7d0b55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447497/normal_601af00a1cc18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475847/normal_601fa78be7089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_601f839a34136.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368736/normal_5fed72b48f822.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lifuzopa.pbworks.com/w/file/fetch/144792510/jatikujipedup.pdfIn PDF document text
    • http://nikekuva.pbworks.com/w/file/fetch/145312596/kingdom_of_ash.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60d431c2fded5e6079f32751/1624519106520/consumer_behaviour_in_tourism.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60d5d14ac03cf36ddc2ed3d4/1624625482912/82241223630.pdfIn PDF document text
    • http://nipekari.pbworks.com/w/file/fetch/145102515/fesisizubuzobupak.pdfIn PDF document text
    • http://lebunurivugu.pbworks.com/w/file/fetch/144644436/wotavazozeserukanisuza.pdfIn PDF document text
    • http://kiwazotomija.pbworks.com/f/danodapof.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60d076a56e69b00291bfae88/1624274597454/vpn_master_play_store.pdfIn PDF document text
    • http://patimedudemu.pbworks.com/w/file/fetch/144676740/gumalezutakidinizawo.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6F 5548 bytes
SHA-256: 4b34306f173026ed9babbea42e3f5678e34707ae3795a1baa37c0dc9d78453c7
font_01_sfnt_off00011e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E48 11304 bytes
SHA-256: ddda5a817973d6a9c49e541a365b0a1b3c732587ec52c31eacf40b3aa2f9cba7

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