Malicious PDF — malware analysis report

Static analysis result for SHA-256 441a74da3c52b092…

MALICIOUS

PDF

40.4 KB Created: 2020-11-01 07:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-05
MD5: d1c037cce7b814c5950c147a753bccf2 SHA-1: b6c5ab84987a6b2c54001f8be49f4744090b966b SHA-256: 441a74da3c52b092f35f76e38b92b4cfc5fc3e8411c539533bce342ce5c21b9b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/tipafekasabujif.pdf In PDF document text
    • https://s3.amazonaws.com/remuv/grade_4_math_practice_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/zinedatagufipetiwakinaz.pdfIn PDF document text
    • https://fopimakalegej.weebly.com/uploads/1/3/0/7/130738542/97279.pdfIn PDF document text
    • https://butebipibib.weebly.com/uploads/1/3/4/2/134265815/xuxeduxiziri-nifilufob-fekevejuxel.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/karubexorepug.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/54743736073.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/vasurezumaxilela.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/kotel.pdfIn PDF document text
    • https://detosujedeke.weebly.com/uploads/1/3/4/3/134371576/f040ec.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/bengali_theatre_script.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/mipedexugojikabadojinam.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/jipox.pdfIn PDF document text
    • https://ggtraff.ru/wb?keyword=pdf%20compilers%20principles%20techniques%20and%20tools%20PDF link annotation
    • https://ggtraff.ru/wb?keyword=pdf%20compilers%20principles%20techniques%20and%20tools%20(2nd%20editionIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004fd5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004fd5.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off000085f9.bin)
    • https://uploads.strikinglycdn.com/files/6deb7109-a0a5-444e-8375-97c5b018b1ca/javafx_exception_in_application_start_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe1ab57c-ba67-4bb6-bbc3-ebaed81eeef6/raderotato.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 extracted file (font_00_sfnt_off00004fd5.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD5 5688 bytes
SHA-256: e817fc23b34f096524ab0fb4c78c200f2ada6bdc2c43fc3676e44ea76dc3e947
font_01_sfnt_off00006303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6303 10464 bytes
SHA-256: c2985d9b84d017bbe6428f1a0780f5c0b84ff754b41cb0a2f7b60a0dd3e14c5e
font_02_sfnt_off000085f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3