Malicious PDF — malware analysis report

Static analysis result for SHA-256 263ded87ee25d1a7…

MALICIOUS

PDF

87.6 KB Created: 2021-02-07 00:19:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: e0b48f90fe3b9b76dc19cba5cd379f75 SHA-1: f91cc526ff4cbf1e6c91a3e1c50b481fc384deb7 SHA-256: 263ded87ee25d1a7e4c1342f312b9a7c363c197a8c2c3fac5fca9d6193b426b1
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/shook?utm_term=hide+and+seek+2013+movie+online In PDF document text
    • https://zidoboxeped.weebly.com/uploads/1/3/5/3/135324118/xalugeveb.pdfIn PDF document text
    • http://nonretloli.site/polka_dots_and_moonbeams_sheet_musicgxz8w.pdfIn PDF document text
    • http://help-bluebadgecenter.com/bernard_cornwell_13567y9f1.pdfIn PDF document text
    • http://zozemumole.iblogger.org/dakodiwuwanedepegetison.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457881/normal_5feb00cfebadd.pdfIn PDF document text
    • https://kofulunaj.weebly.com/uploads/1/3/5/3/135320514/1a75fe88fd3.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/cjcxiaG/epic_games_2fa_video.pdfIn PDF document text
    • http://vilopeg.xyz/bararenajon6fwh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_5fc6ff8277f37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465255/normal_600171e118ee6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403118/normal_5ff61d17ea223.pdfIn PDF document text
    • http://dkmz2.club/biology_practical_o_level_notesbdnli.pdfIn PDF document text
    • https://jevilorusijugif.weebly.com/uploads/1/3/0/8/130874204/rerore.pdfIn PDF document text
    • http://xudisoda.66ghz.com/83245495770.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jinesiwi.epizy.com/duxirumafagaxurozeb.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_off00011b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1C 5448 bytes
SHA-256: bd84685432223f6db5a9911d59dcf4bdb3186baf519b85b15ae0edf74bacd0b3
font_01_sfnt_off00012d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9D 10520 bytes
SHA-256: 0d55508db74ee3190e7565523a2d563b67977a86613b8dd659f61bb2cad0b6d6

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