Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5da8dcd7a8294b3…

MALICIOUS

PDF

514.5 KB Created: 2022-02-21 01:54:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: 1a9cb00f44ed782a9e5df873c4b284cf SHA-1: 3f7834ed544bbd901d7d11e91709a3d0f97ef3fb SHA-256: c5da8dcd7a8294b36ff6e77b702de3e0fdebf264429ce6594190f47335a06255
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a high-risk heuristic firing for a redirector link, indicating a phishing lure. The primary URL, 'https://podar.co.za/XSRYdR1H?utm_term=adjectives+and+adverbs+worksheets+8th+grade', is used as an SEO redirector, suggesting an attempt to disguise malicious content as legitimate downloads. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4221

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://podar.co.za/XSRYdR1H?utm_term=adjectives+and+adverbs+worksheets+8th+grade PDF link annotation
    • http://eurogalvano.com/admin/kcfinder/upload/files/30278151289.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/161955d5f4a5f1---66429560399.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/kevuruxaxebeletefasef.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/90045598469.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/nitusafubofelilinexo.pdfIn PDF document text
    • http://skia22.ru/pic/file/43280306243.pdfIn PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/sewedexatavufojodok.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20211005080248_iw6u5x.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/sufilurubivulepu.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/pabuven.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/selenavekajaxizazodi.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/rilekikixuxub.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/57613737769.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/95062728209.pdfIn PDF document text
    • https://www.miroku-mfg.co.jp/system/js/kcfinder/upload/files/rovilokunutibeg.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/fesopufililozi.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/15283795238.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26694939020.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/tijer.pdfIn PDF document text
    • https://mhreng.com/userfiles/file/26475133751.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/fosirozoxuwabofafob.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/pexuxalosebirotazaxegifa.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/57179627952.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/86892785524.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1617e6c6b6f3b5---gutufadudojonewanamel.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/wofogutolepigiposofarilod.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/55166136134.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_off00079a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A70 17944 bytes
SHA-256: c65c66176dbb0866eb7adb4b1697e11440e3cbc68b91dcb22d1bd0e54504ddff
font_01_sfnt_off0007c929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C929 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0007e049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E049 11304 bytes
SHA-256: b1278237bd61a03afd9bd1350111b6e0e909010ce2178ace748b3e39ccea2727