Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61f50599c812a67…

MALICIOUS

PDF

65.0 KB Created: 2021-01-03 22:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-15
MD5: 1aa7d499caa65c06504b89614b5e7ac8 SHA-1: 824cb9bb6ff8214f54759870b81ee6d3b1a7b5e2 SHA-256: b61f50599c812a67258ca2b657bd423904e2501f7e3a56a30fcaee83f8c9332b
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://wizemeleg.weebly.com/uploads/1/3/4/3/134307012/bujeb.pdf In PDF document text
    • https://cdn.sqhk.co/rewakevutel/JukEhfN/songkick_concerts_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5fd5f22625baa.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/5nAmkha/phantom_bomber_b17.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/conversaciones_escritas_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460706/normal_5fd11721ab2bd.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/puzzledom_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/cbibjcX/viluwepegulunomuzew.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/ijVjagg/57220365472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_5f96fd9a1af66.pdfIn PDF document text
    • https://cctraff.ru/123?utm_term=alice+in+wonderland+door+decorationsIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000c112.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000c112.bin)
    • 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_off0000c112.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC112 5012 bytes
SHA-256: e9f3e0c8ec98fbba3f5a2bf59ea9d8c70b07da559419cf8371f43ea63fbb0cd6
font_01_sfnt_off0000d23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23A 10544 bytes
SHA-256: a97b683abeaf0d079cce990e7ad64cedb10d5ca16169bb87ac9005d572b64ad0