Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca634c19b53740c4…

MALICIOUS

PDF

69.5 KB Created: 2020-11-24 16:27:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-06
MD5: 9d39d9cef71c94041b709a0405b97395 SHA-1: c6a13bd6e7e4f5d5b79293d2d6410c3dca98c0f1 SHA-256: ca634c19b53740c4ecf2331cde4722398a4f079146a21407c990645d6d140fd4
196 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
  • 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://trafficel.ru/123?utm_term=what+is+charles+law PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5f8a5ec850a5b.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/62680890518.pdfIn PDF document text
    • https://gusobenatidisa.weebly.com/uploads/1/3/4/4/134475091/nabusiledigeja_kubamidas_nivut_minebitozoru.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/dogoxeguzo.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/rudejonof.pdfIn PDF document text
    • https://dilopimejaz.weebly.com/uploads/1/3/4/4/134487403/836809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_5fb42e47bc211.pdfIn PDF document text
    • https://jixobufasov.weebly.com/uploads/1/3/4/3/134324480/9412840.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/zitexoma.pdfIn PDF document text
    • https://lewixixidofuj.weebly.com/uploads/1/3/4/3/134393564/9102428.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/george_steck_piano_baby_grand.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/300zx_manual_swap.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/ponaxelakix.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/rezovovob.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/zekuxukikibefon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5fa9713e2f6f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000d31d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000d31d.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_off0000d31d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31D 4992 bytes
SHA-256: 88880e03d8cf96e1324dcf4dd8e137bf79d2c87695da2c59aba7cc4243434275
font_01_sfnt_off0000e426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE426 10752 bytes
SHA-256: 692ce8ae579166b032e55f2825cc2478ef93233fd961a2a1bc2dc7177f84bf8f