Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0c8639bfa8ecde…

MALICIOUS

PDF

65.2 KB Created: 2021-02-18 03:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 079d85289a15910cf3863da4b382d608 SHA-1: c8eb1d819095d32217ffa22f6ed9f306554fdfdf SHA-256: 9c0c8639bfa8ecde04d3e0245b5371eb8b943ddcdbada4cf00bdb9e629741c54
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://baarspo.ru/wix?keyword=scale+development+theory+and+applications+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481847/normal_5fc9c3207989c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417137/normal_600062147e11f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484641/normal_5fe6264906f2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_5fe9ce08dc519.pdfIn PDF document text
    • http://osthondroz.com/cough_suppressant_pill_formfmt8l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5fea149182510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503050/normal_5fdbc50c7a4b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373301/normal_5ffa3ee16b8bd.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/fuwenoxuzasila/60213085040.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/wilirexiburogamotakolofos.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/576854752.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/juzolubuzesumasup.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/wallpaper_3d_name.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/vatawetifiponikeminusuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/4174202328.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_off0000c3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3BA 5660 bytes
SHA-256: 0615bd44e2870ccea62096dc1c1309b756cc774a984fe2168bc502bbbb27a69b
font_01_sfnt_off0000d6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EA 9640 bytes
SHA-256: 2390fac1cf47701ddf7173367fd50c2b6108ece907a9721083d8a24a375b9ca4