Malicious PDF — malware analysis report

Static analysis result for SHA-256 c364c3d13270593b…

MALICIOUS

PDF

64.9 KB Created: 2021-02-19 04:38:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 1ea5cad3b2d14c35d565ea739b513bc1 SHA-1: 6ef56aa22533dc9490c6e891fb55f6a937e3d733 SHA-256: c364c3d13270593bb7f16205919969ce169d46fbbce6eb3e43800185212f4e72
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 embedded URL that functions as an SEO redirector, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to lead the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=dji+naza+v2+manual+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473632/normal_5fd9e4c44dcd0.pdfIn PDF document text
    • https://cdn.sqhk.co/zabeluzitema/bjfBhbe/balloon_designs_for_baby_shower.pdfIn PDF document text
    • https://cdn.sqhk.co/gasubapo/4ifshj2/22561941501.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/d3qPhgQ/school_driving_3d_ios.pdfIn PDF document text
    • http://tedisesux.22web.org/kure_beach_fishing_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461786/normal_5ff403f917902.pdfIn PDF document text
    • http://neroveruturom.iblogger.org/monohybrid_and_dihybrid_practice_problems_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/PohajcK/baixar_xenowerk_apk_e_obb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459788/normal_5fcbf7c2d9217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_602bae3ebf08a.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/fTQNiih/swing_left_east_bay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_5fe088cf41908.pdfIn PDF document text
    • https://cdn.sqhk.co/tikikizeveni/DigKxha/top_space_arcade_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460446/normal_5feecb676651a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jofesosozofoso.epizy.com/96313344037.pdfIn PDF document text
    • http://wegizadix.rf.gd/enteral_nutrition_clinical_practice_guidelines.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_off0000bf5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5B 5400 bytes
SHA-256: 99b1ac6fcb87ab7916f55e3c8bea93351ff28ce197bb52564ae26b989892086f
font_01_sfnt_off0000d183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD183 10344 bytes
SHA-256: d550dff8b2504806603d3bcad5421e71ff593f058675846965f81df93866a0f0

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