Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc19f50b4137020…

MALICIOUS

PDF

73.2 KB Created: 2021-09-02 09:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: dcf263c089b7fc663e252647fbfeae72 SHA-1: cb59272a721461a58f2dd9a27dac0c9e29eab75a SHA-256: ddc19f50b413702090a7930e7940de9c545fa47df8359a311abeaee478269487
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms and serve other PDF files. This behavior is indicative of a link farm used to distribute malicious content or conduct phishing attacks. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/b9b6d2bddcd63f3a2c7f7452dbb7e988/23518899709.pdf In PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/149a175b7be4787dc72accc9dfec0f59/majefigeg.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c387e625a11---datewe.pdfIn PDF document text
    • http://nature-revive.org/files/file/nigawewipitipirevilulida.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/17486703447.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/92032305054.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/pebikabexififol.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/89004549947.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/79850669078.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/161081e3f122cc---72807176949.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/furev.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d240067224d---75307980159.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/60348156969.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/zarake.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/h84q8dj5l6b5fst0ho6n1iic3o/mudabot.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/jazebapinokekevova.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/34689091418.pdfIn PDF document text
    • https://pmms-online.com/assets/file/38330710614.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/89100588565.pdfIn PDF document text
    • http://turnyras.lt/Files/file/69962340354.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160d1db9c60b3b---jawonunetiludud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=the+curse+of+stone+wowPDF 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
font_00_sfnt_off0000beea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEA 10284 bytes
SHA-256: 37237bc10cef7831bb9175807ff166109dc01a316d42912a6067e41454f97110
font_01_sfnt_off0000d623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD623 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE35 15860 bytes
SHA-256: b9a67216fcce9e59b9e2284889893f7ce35fb0f92ae44e72e5ba86881b6f5f92