Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd78a1a794e56455…

MALICIOUS

PDF

64.8 KB Created: 2020-11-29 04:23:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 10cc5addf8f503b2827f7dbbaaccea25 SHA-1: b747fabf5b3bde3bd7cc75ef6b1dc3a99630f8e5 SHA-256: cd78a1a794e56455c91adacefb9f1a452c8dd02f557f28834bf8d2ae905aa7a6
136 Risk Score

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://trafffe.ru/wb?keyword=sample%20doctors%20note%20template%20for%20work PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426418/normal_5fbe1a42df749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417527/normal_5f97bba79d237.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/woxorojero/guide_translate_in_malaysia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d0375f-9612-4c55-808c-3d0e432dff82/estado_de_guerrero_traje_tipico.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/alex_rider_skeleton_key_weebly.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/minority_report_detailed_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/the_diving_bell_and_the_butterfly.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/zegowemupomo.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/c_windows_forms_listbox_checkbox.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/shl_logical_reasoning_test.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/84207410091.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/bepiput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8bf4904-b0de-402a-a6e0-23bfdd62a03a/ligobavesigifilobufezo.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_off0000c344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC344 5560 bytes
SHA-256: ae11f2c00b761bf4dc8c9d1bbc514f761b9e4f2d1ea1a3670fc8efb4ae56aded
font_01_sfnt_off0000d62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62A 9492 bytes
SHA-256: 3cc9522e8d6c01be63747f2b585fdcfd04af6727cdef9433fd1e12077d9ce36d