Malicious PDF — malware analysis report

Static analysis result for SHA-256 d616e3f165ed0032…

MALICIOUS

PDF

103.9 KB Created: 2021-03-03 17:31:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 615b79435d099e5414209c56ef556bcc SHA-1: 1f05972170c84ab4f06db9b8aa6adf0d37336025 SHA-256: d616e3f165ed00323e9a25d3508aa30a4a38355b50c6e25fba6dfbefd877152c
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which point to SEO-optimized PDF files, suggesting a link farm or phishing campaign. The primary lure appears to be 'wing tsun kung fu near me', which redirects to a URL containing UTM parameters. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://mezovuduw.ru/123?utm_term=wing+tsun+kung+fu+near+me PDF link annotation
    • https://cdn.sqhk.co/netimupoxojo/dZx7he0/where_to_learn_python_3_for_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410462/normal_6034c28132161.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/hjhgggf/vikinemiwixekodorerujo.pdfIn PDF document text
    • https://rejasujewefem.weebly.com/uploads/1/3/0/7/130738882/87313eeae76.pdfIn PDF document text
    • https://wizodorifezeniv.weebly.com/uploads/1/3/4/7/134715638/cd87c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474988/normal_60109138b6479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457000/normal_603eea7075499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_603470488095a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404738/normal_601af7edb7e1e.pdfIn PDF document text
    • https://cdn.sqhk.co/jigekuragige/ibehfgg/jonibivusas.pdfIn PDF document text
    • https://maninidepot.weebly.com/uploads/1/3/4/7/134702581/b5bbf2e79025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_603000fe20c02.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwapusumoge/gjgeaId/24913897468.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372360/normal_5fe3f8f12b14f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376849/normal_5fd78cba2cedf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376125/normal_600ada64d2a48.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/tumuzu/19169704574.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/crane_cool_mist_humidifier_no_mistaire.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/67538566367.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/impossible_quiz_answer_level_48.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11575 19236 bytes
SHA-256: d1de978641dd8ab969963d94f72ab7b426a834c48e7cc40fef3618d39d602dcf
font_01_sfnt_off00015247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15247 5132 bytes
SHA-256: fb6c133e74c4361f3e2840e3ef1dca2854c9137f42e0d08891b56a58a618d9e3
font_02_sfnt_off000163c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163C6 15776 bytes
SHA-256: caf0af9dc8c37bdd5433cc798280e88b2b376a1dd62d19c3671295e112b87530

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