Malicious PDF — malware analysis report

Static analysis result for SHA-256 987cff7e7b155d92…

MALICIOUS

PDF

68.1 KB Created: 2021-02-20 17:19:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d558cbcb0cf83f15bc08acc98cc81d41 SHA-1: a6cf196e939a442e5fa47fa3c68e80fe0f454586 SHA-256: 987cff7e7b155d928f8edb85d9176c4b2f6107a9cff757213cdc1e4ba7fb3378
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=generation+2020+lawn+collection PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459162/normal_5fff64a07915c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505771/normal_600b91926b0f2.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/ghJhexs/vafor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392441/normal_60210d2d93e95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475853/normal_601d80d28e1a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420610/normal_6016fb737346f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446374/normal_5fce74362c9c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426066/normal_5fd630da65bbd.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/oFijBgd/gevevodemavu.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/woxewiwupir/little_alchemy_2_game.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/three_letter_words_in_english_worksheet.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_off0000cfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEA 5012 bytes
SHA-256: 0eaea510aa8b17361515fed47a6b6ab9c351f1aa7ea941d09cceaea67895f50d
font_01_sfnt_off0000e115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE115 10128 bytes
SHA-256: a08ff751c984ef552ab859295b77ef4fdbafade022d662c5b69f354de26e2c3e

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