Malicious PDF — malware analysis report

Static analysis result for SHA-256 191dc90f7747d13a…

MALICIOUS

PDF

68.2 KB Created: 2020-11-13 15:21:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-22
MD5: edd76f011ca2847f2ba3a04200e1ed52 SHA-1: bcddccef733cdfec19c25d2d2123f4f4bf820137 SHA-256: 191dc90f7747d13aeed20e5d408b44a59f57a8285b160054cfbd45df2122717e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=the+moving+finger+writes+big+bang+theory PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f918eb70ae34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5f8ccc60cacf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f932d4a3a470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_5f97ec3fe2483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425230/normal_5f9dc0a774f92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5fa09a9718129.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/jifesu/belolunajex.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/45216624705.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/11898327513.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/rizukan.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/19724406060.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/zawowuteximegisap.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_off0000cd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD14 5492 bytes
SHA-256: 037b7b3f911024a77a2f76e9cf69ffc46f103f86792df5553c09257206b7b6ee
font_01_sfnt_off0000dfbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBC 10644 bytes
SHA-256: 715464a024255665dcb706017befd6703c1d988defbbb08b129ebfbf433f167f