Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b503ac56fb536e9…

MALICIOUS

PDF

72.6 KB Created: 2021-02-10 12:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b3ca51daf6d2b844b8859df24bf3750b SHA-1: 97e49fd84794fc7247dea68a25776f92b2f32d96 SHA-256: 9b503ac56fb536e96d6cda7f04797e73265b04d5016d278442d114cb0da8e3d0
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://jacksth.ru/wb?keyword=service%20of%20non%20alcoholic%20beverages%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383321/normal_5fc90e77a9ce7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5fef43a850984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_600c3771ebe92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458623/normal_600775d6ef728.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404310/normal_5ffe183320045.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501479/normal_5fec3e32a82bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374207/normal_5fe3d66bccd61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416331/normal_6009321864a0c.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/geoMhi4/890444570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488317/normal_5fd30edb3d7d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5fd69a4d7f31d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_5fd0940ae03f8.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/jevelel/windows_live_messenger_video_call_free.pdfIn PDF document text
    • http://vumavoralamo.rf.gd/xuwixapope.pdfIn PDF document text
    • http://mapureju.epizy.com/noun_determiners_worksheets_for_grade_5.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_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 5720 bytes
SHA-256: 60e5224b4e97277013dc991fbb783c294f2c6bc25df5ffe86ac0f74b3a339b9a
font_01_sfnt_off0000f060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF060 10816 bytes
SHA-256: 202a2e7f823d0efd2dc8cc51078e5b0a4c0e9294339c2fe2b3e02252d31d01ec