Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f73ed16ed591c6…

MALICIOUS

PDF

69.2 KB Created: 2021-02-26 18:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6a92e80648c4ae598d32ef996814ef21 SHA-1: 45ba72b558a2d22e3cf0eb2d28b5c54ab8ea6738 SHA-256: 20f73ed16ed591c6be9b28a093e0d78d419abd89a301baa55b97e6d652407782
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://gimoguvi.ru/award?keyword=troy+bilt+tillers+pony PDF link annotation
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/nixiveliro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496616/normal_5fd7901456ce8.pdfIn PDF document text
    • https://nulebuset.weebly.com/uploads/1/3/1/4/131411431/zidotigopibe_rejakanufe.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/jeluditisinefesesoparele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_602bd9c11ab56.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/xuzed/94097710835.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/how_to_use_a_rice_cooker_zojirushi.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/46749030157.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/agenda_mercantil_2019_gratis.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_off0000d308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD308 4796 bytes
SHA-256: 4c1feeb43484ba4a419ad8066f6663dd84d6887c487705705193c2c889b9b7e6
font_01_sfnt_off0000e367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE367 10464 bytes
SHA-256: 622df2d17fbbdedac9cc1d32ad74370a6a9aa8fcf4cc3fd811dc810127ce19ac

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