Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bfbfe4db08de43…

MALICIOUS

PDF

299.4 KB Created: 2021-12-17 19:12:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: dc3ba6a612d36e8891c8da4adaa337e3 SHA-1: df4f5b1af5c251f2870cad23f3f345e978eb870f SHA-256: 72bfbfe4db08de43f49cfa303a572ac07f3793429acbe4d8d0be28c6f86c3f96
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9332

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://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615cf1cb7b32f---26881018588.pdf In PDF document text
    • https://electroagro.es/pub/files/zaxiviwijapaxafam.pdfIn PDF document text
    • https://sandipkumardutta.com/ckfinder/userfiles/files/34003595239.pdfIn PDF document text
    • http://nhatnamvina.vn/rich_editor/file/59827894929.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/meladipo.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/48279842791.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/65839853687.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/nigutofewelaja.pdfIn PDF document text
    • https://hilanguage-com-tw.triangle-design.com/files/67234255540.pdfIn PDF document text
    • https://escolaalfa.com/userfiles/file/rebapaxulal.pdfIn PDF document text
    • https://cathita.vn/upload/files/33960487972.pdfIn PDF document text
    • http://bluebossa.pl/files/file/13766207531.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/volelonikotirawipezu.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/5995580573.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/rufetemokatefi.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/36546205613.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/62525658969.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/EqozwcbAC44/uplcv?utm_term=dramatic+irony+examples+in+romeo+and+juliet+act+1PDF link annotation
    • 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
stream_004_off0004597e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4597E 16692 bytes
SHA-256: 6e2d3121991fdb8de6cadecc67ced5099ec000926b65f7197b831bd5b5df9b19
font_00_sfnt_off000442df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x442DF 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off00048516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48516 11172 bytes
SHA-256: d0e09e0d29611dbb0091649576cf7b8f7fa92266a170102a5266c837e32f12e5