Malicious PDF — malware analysis report

Static analysis result for SHA-256 941b0db6eea4e173…

MALICIOUS

PDF

455.3 KB Created: 2022-03-16 14:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 5c4db4b69651107cae3e475ca65ce575 SHA-1: 8ebafe79b03055c23f7f924e1dfbbbdf70bf5d46 SHA-256: 941b0db6eea4e173345a3e08d9d51e0dbdf92d0a3e5ef7729f7109d83225d718
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a high-severity heuristic firing for an SEO redirector link, indicating a phishing lure for free downloads. The ML classifier and ClamAV detection further confirm its malicious nature. The embedded JavaScript likely facilitates the redirection or execution of a secondary payload from the identified malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5873

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://yubit.co.za/XSRYdR1H?utm_term=fresh+graduate+cv+template+2018 PDF link annotation
    • http://morebricks.com/ckfinder/userfiles/files/74451846066.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20220206_53D99CC62E90A4D4.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/5898481843.pdfIn PDF document text
    • https://www.starvisaservices.co.uk/application/elements/plugins/kcfinder/upload/files/rurunovujafefubujanefepab.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/wukaguz.pdfIn PDF document text
    • http://bbckorea.org/user_data/kcfinder/files/89336427898.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/xubowitosuvukepipi.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/nexekujetusi.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2022030214214673499.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/rejov.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/81420268757.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/vimuzapizalobusamozoj.pdfIn PDF document text
    • http://telefoonindex.nl/images/uploads/walix.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/161ff5772c662a---59057525963.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621330f871a01---kutovaji.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///nuwatepefibegonufab.pdfIn PDF document text
    • https://companydemo.opusviewdev.com/app/webroot/js/image/files/95534462705.pdfIn PDF document text
    • http://www.oftalmed.com.br/files/ckeditor_custom/kcfinder/upload/files/wifuzesemonazowi.pdfIn PDF document text
    • http://burfel.ru/upfiles/files/jetevubelurilusukoj.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/5671926334.pdfIn PDF document text
    • https://andreanpantravel.com/userfiles/tnejp/files/17879550533.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_off0006ac96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC96 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0006c3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3B6 11288 bytes
SHA-256: 1adb0aacca739a948d9647579a476c19433734694a2145e9657ad46da78f4e9f
font_02_sfnt_off0006de31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE31 18784 bytes
SHA-256: 9c9d8f8a17d11ac913b3317d9b64f427cb6425ede59b985d689a282865a7b768