Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bce5625b67801c…

MALICIOUS

PDF

85.9 KB Created: 2021-07-03 02:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c3cfded30f1b7069672f700a5349ba58 SHA-1: 5c80beb8755a54e2ed117da9e685f2307e6072ff SHA-256: 93bce5625b67801c819f45b61cdad51d946707e6b9ae620fbd5c6ed6571990e5
154 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. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5910

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
  • 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
  • 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://wastran.ru/uplcv?utm_term=watershed+management+ppt PDF link annotation
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/0e8e4e35785257d7ec59012f45255c10/60847683139.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/654v82nfikcf3saak4u6jjbeuq/70726397892.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/1e5f50c17a24ba364343af6f013b3be6/xemanevugusejox.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160be671572e8f---fajozarerobipizeta.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/zaborujo.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/17bc59dd9c0e7ee9bb75f4d625a16723/81490918997.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/qmaerdo7rciknfipmt908am1p4/4207799451.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/31746570249.pdfIn PDF document text
    • https://vieiras.pt/imagensprodutos/file/sanuposoxurogumavoja.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8c2c4c88e---mulinijuxewulijawi.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dcd8b67e17f---ritelojewa.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/61005148223.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/ceb0e3fecf71cd89a93cf9e02e2032c5/jajalajititumevisumo.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/47217720549.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/jofobaz.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16076de0a8e9fc---11809393590.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/99254684d3f994d96db9413f0fa28444/gemezomaruwewo.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/5983170335.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/xupovaz.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/sixubiz.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/k8vuifana57rovu9571g5e67j3/luvatu.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/kdihpit2jhi8ijm8a42f7vgred/59585332968.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/eq3ubkua2ihcfl49pe7dfc8712/35517325369.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/fozofuki.pdfIn 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_off0000fa70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA70 10576 bytes
SHA-256: f66bf7279e0de5e9316f1405e05f9ce285018f6783a481f7a46381e01c394f30
font_01_sfnt_off0001122d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122D 16380 bytes
SHA-256: 2f0f2b2eb8adfd382bd5595154112d9a96155f591f04685a5888fae58ac66125
font_02_sfnt_off000128c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1