Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bf4c824f04c2ec…

MALICIOUS

PDF

77.8 KB Created: 2021-02-11 21:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 801891838e46c3c5682cf53b70187860 SHA-1: 254f8490b1401074c1c1d50353337e5581e0841b SHA-256: 93bf4c824f04c2ec51fd522f979590a0b07cb49ea2c72d665762007e164820d9
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=watch+after+online+free+online In PDF document text
    • https://static.s123-cdn-static.com/uploads/4481988/normal_5ffb0e6ca3a88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414352/normal_601d87e7bf46d.pdfIn PDF document text
    • http://brumbum2.xyz/410289112555c2c5.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/Fjhhb6Q/league_of_stickman_2-_sword_demon_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452206/normal_5ffb56dc39885.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451350/normal_5fcd53411e3f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_6023c8b25abe0.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/jcIBib8/new_quizduel.pdfIn PDF document text
    • http://generatorsale.ru/shoot_em_up_2007_trailerxpzup.pdfIn PDF document text
    • https://cdn.sqhk.co/wavagowew/jjjeifi/doguti.pdfIn PDF document text
    • http://pmaider.com/tedaximigukibti6to.pdfIn PDF document text
    • http://b4shop.icu/35527235864fmxp5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408599/normal_5ff13ca32681a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_600fab56b2e79.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/zowibatev/48146234567.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_off0000f404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 4804 bytes
SHA-256: 2b7621027fcd13a58f5b78e7ac28c701c61637927e15dffa847c7f9365c3cc12
font_01_sfnt_off00010465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 11480 bytes
SHA-256: 8b931e474e5d4a5611522c8fbb2de1c3a748a577ae3044a0a9916e76590af899