Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1051fed815b4e32…

MALICIOUS

PDF

68.9 KB Created: 2021-01-27 12:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5694a22937cf94737030a7d801386eef SHA-1: 0efa5ee88e7c3b242f029d1df1ac909e7e42168e SHA-256: b1051fed815b4e32c27e836237627d7ed7f6859a73c70adde5120cccb3ee989f
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://jacksth.ru/wb?keyword=led%20light%20strip%20controller%20battery PDF link annotation
    • http://creampiepow.club/822072384143b22s.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/gcjhejf/easy_ice_cream_recipes_no_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/xhgnieO/vurigo.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/rhg5sjj/rank_of_a_matrix_eigenvalues_and_eigenvectors.pdfIn PDF document text
    • http://onlineeshop24.xyz/basketball_world_championship_2019_wiki6vlcq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463300/normal_5fd9b7fa1a2f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421472/normal_6008aa47ef4a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490736/normal_5fd9fa715dd5a.pdfIn PDF document text
    • https://cdn.sqhk.co/nufanusiki/N1ezicF/56765783578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416510/normal_5ff290e018039.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/chfzieO/death_coming_mod_apk_1._1._5._664.pdfIn PDF document text
    • http://sluzhba1.net/interesting_facts_around_the_world_2020evk9v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459935/normal_5ffa43c96da07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_5fdbd8eb0956b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500208/normal_5fdc8efac0542.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD079 5516 bytes
SHA-256: 2ebc06a502b9267ebe3fafacede83bd01f986d8c4b79370726685a90ec7780b3
font_01_sfnt_off0000e335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE335 10380 bytes
SHA-256: bddc3f37136f2a7440547687ce36f788ba9f168fbff5583f3c2a300be0346eee