Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a0432f3f9dfe36…

MALICIOUS

PDF

74.5 KB Created: 2021-03-04 00:15:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 09a06e866002244f0a76e6e7f331154e SHA-1: 51a0d2bace08009e37019c27994636e2c7a98129 SHA-256: d7a0432f3f9dfe36ad88bea155150f9e79d6473ef35d8baf892360e8c7023274
194 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
  • 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://dafemum.ru/wb?keyword=what%20is%20the%20deadline%20for%20college%20applications In PDF document text
    • https://cdn.sqhk.co/jusupovexewa/ghhigfQ/windows_movie_maker_alternative.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426556/normal_5fec4f41e94a4.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/hjc7ihh/91797411010.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/8jihifA/tiwisukoxalir.pdfIn PDF document text
    • https://cdn.sqhk.co/kasesiseb/Vh9Hheh/catfishing_rods_and_reels_combos.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/brFhjkn/short_loop_of_henle_function.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_600ca80b9b3a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492245/normal_5fe3bf89b2b05.pdfIn PDF document text
    • https://cdn.sqhk.co/xutujipux/1mgdZig/wumexojuteralonajebuv.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/ccijvje/sandwich_near_me_delivery.pdfIn PDF document text
    • https://cdn.sqhk.co/surofowudula/jficjcE/narofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491934/normal_6012e31f9a67e.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/aggticD/more_mutant_mod_for_minecraft_pe_mcpe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tevefetilojas.atwebpages.com/65016601758.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/memezoxibotawaxadumijabij.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_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 5432 bytes
SHA-256: 60770e6a84bc7fe6d3cdab93a409f949155892796eaf7521fe6417d993716058
font_01_sfnt_off0000f8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D4 10664 bytes
SHA-256: 25eb96b75d85ef0400b51f940d9bc61a17d5569f58f3f3cb67f0960e89155fbc