Malicious PDF — malware analysis report

Static analysis result for SHA-256 1216102980ac1189…

MALICIOUS

PDF

84.3 KB Created: 2021-06-27 05:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6f64b350b40b36e89e9466def8fa812b SHA-1: 3f48849a8339bc27f1ba1dce704d9d1d9d33d29e SHA-256: 1216102980ac11895925f4892747ece34d8374caebe3c7e3d25e9efddc71c804
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19fdf706ba---66114404155.pdf In PDF document text
    • https://audreyheselmans.com/_files/file/82527440860.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/df1e2fc7b46aa9e9f465877e119fefcb/nurusapezosoto.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/watixikamirunezozifo.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/53735407592.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf53031190---22298397282.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/8a15cf5ec66dfd3468a3683418b46da4/97669941514.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/29988306505.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/37151198009.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/0qtr4pml22qp99kqn4om5r2mrn/dapenosanusobuniwov.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/29794876010.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/f743fa2eb76562796342f31493fb18e0/mogagofud.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/19366fa8e48b85f128ffc0a26280d02f/8293461465.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb2cdd3f31---foweguvadegupe.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609632ce70e59---16836638042.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/r9ovn361p2a1d15q72edprrbu2/64970474467.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/74766300183.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/90613320595.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/sipigakota.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7ba1743bc---95311275584.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/dexujifoposetasuzuk.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/aa04b15c8e70c546bbfeb90ec71c03eb/78752559026.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/108db546c4668e54ef09256077a55a5b/20438761573.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=powers+of+products+and+quotientsPDF link annotation
    • http://irodori.kir.jp/files/file/fafuvajetosis.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_off0000e17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 10900 bytes
SHA-256: db6a7025f3d1857a29630961b94d99cf0b2b20fbaf898187be40f668d64aa3b0
font_02_sfnt_off000112d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D0 17964 bytes
SHA-256: cdee0b8c50a9c8d0775e504e9755c8c2feca9da1bde4cfb281a5ed9191f4262c