Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8be40232a654f8d…

MALICIOUS

PDF

40.2 KB Created: 2020-11-07 03:11:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: 265add90d0cd7e8e215eb9bbec23e051 SHA-1: e29f5d0e96c1718700cb8bfb04b76d6bc897a805 SHA-256: a8be40232a654f8d1b1762c64394adb6459d3f64034d99dacbb851e5361fac04
202 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/123?keyword=amazon+instant+video+app+for+pc In PDF document text
    • https://povilaromegew.weebly.com/uploads/1/3/4/4/134486615/6770828.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/37266711883.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/zikijolokurad.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/lobutikuganodebedof.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/high_school_meaning_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/applied_behavior_analysis_john_cooper.pdfIn PDF document text
    • https://tefidimigeb.weebly.com/uploads/1/3/4/3/134319466/xebozeza_gemakokibawirab_mifofumodi.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/4075093.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005f5a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005f5a.bin)
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/686dcf19-a0f6-4803-82c5-b26781d9b091/sss_sas_asa_aas_hl_proofs_worksheet.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/gabizagamumarokidatanum.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_off00005f5a.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5A 5368 bytes
SHA-256: f4b4315a704727e4d084bbf8862fbdf50074fed3398a83a5470ac9bc408ca87d
font_01_sfnt_off00007197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7197 10264 bytes
SHA-256: 5a4af303d3a04d644ca7fc08eec9864725ac83859ab2cbc0f774f64a8e9ab708