Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f9529fc2406593…

MALICIOUS

PDF

66.9 KB Created: 2020-11-17 20:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-18
MD5: f3f857e3c2cfa38549e118725fa8f0f3 SHA-1: 4b154677055aa13ab0f3f7878167cbf47a08878e SHA-256: 26f9529fc240659314b9ad933986ca8851e11fdd25698255a412c85d25f6e66a
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://s3.amazonaws.com/penefelomiju/bartending_book.pdf In PDF document text
    • https://s3.amazonaws.com/tuxutedi/79327527735.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/gmx_free_sign_up.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/pengertian_agama_yahudi.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/safafejifilegap.pdfIn PDF document text
    • https://nofawubepugo.weebly.com/uploads/1/3/4/3/134373843/lelejuzuwemazipar.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/95178348776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_5fa809a6bbd1a.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/88836270768.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/the_prince_of_egypt_worksheet.pdfIn PDF document text
    • https://tagekoworiz.weebly.com/uploads/1/3/4/0/134016686/luvesenunuvikujad.pdfIn PDF document text
    • https://traffking.ru/123?utm_term=andrew+loomis+anatomyIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000c954.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000c954.bin)
    • https://uploads.strikinglycdn.com/files/bad9e09e-862a-44c4-a863-b20f7e96bd1f/ponukowakelimitowuriribuz.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_off0000c954.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC954 5156 bytes
SHA-256: 9e695a8415e2a50d055583083dd328627d71112c1e4b5a9fe508d5a43ad570e5
font_01_sfnt_off0000dad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD6 10236 bytes
SHA-256: dfe727993fc437b013c0d7f70b5256a3eebbb083732cd89c380a51b51c57629a