Malicious PDF — malware analysis report

Static analysis result for SHA-256 4257ebf4f6b965f2…

MALICIOUS

PDF

328.3 KB Created: 2022-02-16 01:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 1359b03f109249cbf275d70e383a9d2b SHA-1: 4658673b78a61643a901c779a99a62acf638e36e SHA-256: 4257ebf4f6b965f2f7a77796d31e7891908cb1738af02a5d7322dec30654c81c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9486

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://yoyep.co.za/XSRYdR1H?utm_term=air+cooled+heat+exchanger+design+pdf PDF link annotation
    • https://mclandpin.com/calisma2/files/uploads/12588293091.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/butosisexal.pdfIn PDF document text
    • https://attack.lt/images/files/10509130367.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/18497781622.pdfIn PDF document text
    • https://bevillelecomte.com/ckfinder/userfiles/files/73206356589.pdfIn PDF document text
    • http://lunaleo.pl/userfiles/file/16632879347.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/saduwojedekoxetaman.pdfIn PDF document text
    • http://mofald-clpiu.gov.np/public/kcfinder/upload/files/gimuwogaxofepujoragazo.pdfIn PDF document text
    • http://snbh.imadiff.net/kcfinder/upload/files/50988755335.pdfIn PDF document text
    • https://flying-vikings.net/UserFiles/file/wubuxanamesoxo.pdfIn PDF document text
    • http://ibarugi.com/fckeditor/userfiles/file/duzakedazum.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/43166006128.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/7b5dcbe11db43a3b8d8317d8f97cc7e7/siwemufamatufazoxoxul.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/31540830778.pdfIn PDF document text
    • https://ckmandarin.com/uploads/36981926491.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/2721839471.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/c160e9b9f4f8887411df9d4dd2f1115c/zugomefosaluwugipiraxos.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/12061128618.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210719155803.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004b014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B014 10980 bytes
SHA-256: e6c8b2d0600d3b297e1be8a510f44f810410df63477f5d1c4ccd73cae7ac5f45
font_01_sfnt_off0004c955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C955 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0004e070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E070 19016 bytes
SHA-256: 8646ba833147e7961a3946b7cd82c8c84aeb5454233ffa4a52fd14514c675687

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