Malicious PDF — malware analysis report

Static analysis result for SHA-256 445c57a56adc1368…

MALICIOUS

PDF

424.1 KB Created: 2023-10-10 20:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 898970e772bb872e48a46c087aca0a63 SHA-1: 59f910d41c280749eedaaa6a31db2681d2cf3301 SHA-256: 445c57a56adc13680c40cf1c13522975b7ac384eeed9f2b4ab8a1623f1926cac
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a suspicious, algorithmically generated URL, identified as a lure for phishing or malware. This behavior is indicative of a malicious document designed to trick users into visiting a compromised site. The ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier clean score 0.0114

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 link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://gisanega.tevav.co.za/765590392024675791628?zimonegisisibitoluruzajuvi=tubewakegupafigofegudemesukexovokidawafotejesikokirokowazexumetokusoforuwokivikaribawofikokofavatokapefuganurapamukefikuwevipilominuwomewevixezajijekakoxagugomivasonividaxikogamapumejidobosuwipilusiwurexema&keyword=honesty+worksheets+for+recovery&rotikuzazatixemudulezemezegig=natojusubemokakuvuteketogibokadisatefurowazukedebukoxadoburolelawulivadibolafarejopituxozanudevusaledifavakawexanije PDF link annotation
    • https://gisanega.tevav.co.za/765590392024675791628?zimonegisisibitoluruzajuvi=tubewakegupafigofegudemesukexovokidawafotejesikokirokowazexumetokusoforuwokivikaribawofikokofavatokapefuganurapamukefikuwevipilominuwomewevixezajijekakoxagugomivasonividaxikogamapumejidobosuwipilusiwurexema&keyword=honestyPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00064a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A66 11584 bytes
SHA-256: be21467746b39044e5720e80a0c9867ae45ebcabf2d5cae63ee4eb79357696a9
font_01_sfnt_off00066592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66592 17456 bytes
SHA-256: 3c718785aadd2b4e8ead1dd5c3164be6fc3a82ae4141dcc8c2eaf6fd341ad27b

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