Malicious PDF — malware analysis report

Static analysis result for SHA-256 191d56600afc9c57…

MALICIOUS

PDF

58.6 KB Created: 2020-11-29 11:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-22
MD5: acef436b918170b3a5dd75927e453e6e SHA-1: 2e5fe78576c272895ed384c890f75e3466d5ae21 SHA-256: 191d56600afc9c5752fc4744897e45901320ecd7cd7bba9dc445f57e3a89c3d7
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/wb?keyword=pdf%20antropologia%20culturale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454673/normal_5fa00e1cad20f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421629/normal_5fa2a60dbc42c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5fb295cfe4921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416331/normal_5f964b133fc28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379053/normal_5fb48c28e28af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405895/normal_5f92634247ff7.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/bitusajux.pdfIn PDF document text
    • https://lotogifivetizub.weebly.com/uploads/1/3/4/3/134309957/578c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_5f9f2e0f2c51d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5f8ec1d53208b.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/tuxutedi/15917711891.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/examples_of_diffusion_in_everyday_life.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/adobe_reader_full_version_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/biscuits_recipes_with_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/suzeduselu/54788130501.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_off0000ab60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB60 5148 bytes
SHA-256: 8faab2c1392020c2cae43a0f514337e20bce8c5e96e4f26a1db81ccb4cc78407
font_01_sfnt_off0000bcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF9 9624 bytes
SHA-256: 770823966f1f8049579c42e7015dabe6f021a25491dc76e8bc8e0c636fc0897e