Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcb99ceb324766b…

MALICIOUS

PDF

71.8 KB Created: 2021-02-09 17:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a5150821d10a6cb823b2ef3d982480b7 SHA-1: 781e7d552155af950d7faaf4597670c8f3fe326e SHA-256: 2bcb99ceb324766b17c18d4616e14308e9b679fe0cfd35074d9d1a55338b93b5
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=corel%20draw%20x6%20tutorials%20for%20beginners%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412394/normal_601d368ca52c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fc5d8dcd5847.pdfIn PDF document text
    • http://store50off.info/lebaran_tahun_2020_kapanb9m4j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449776/normal_5ff78dba7632c.pdfIn PDF document text
    • http://printnews.site/bombsquad_pro_paid_apk6y3eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_602268d297e5e.pdfIn PDF document text
    • http://pijakonojimuw.iblogger.org/26661086575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471509/normal_5fe786831b86e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_5fea37ef474cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_5fd637eeda912.pdfIn PDF document text
    • http://hookup153.site/allegiant_movie_free_hd2byyw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_60163191bd615.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/sajatofubote/best_free_games_for_android_without_internet.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/47447507593.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/mifepiza.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_off0000dc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 5568 bytes
SHA-256: c7b7cf9aac8b373c9487b6bbeacddfd39e52676125d385da7d6abe585615564d
font_01_sfnt_off0000ef16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF16 10212 bytes
SHA-256: c8d9813559e4485ff5267f3b559479d04070d636b9a4aa28ebfad0357cbf18f6