Malicious PDF — malware analysis report

Static analysis result for SHA-256 948cc675a179110c…

MALICIOUS

PDF

85.1 KB Created: 2021-08-12 01:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d3cd63dc1767a4d70faf2328fcf3587 SHA-1: 76076be5556bd05e7d23a5c829e4bcf6ff0f73bc SHA-256: 948cc675a179110c5f85d8a9f1ecf36a093a5abaf27723a669fb33b2428ebde0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous external URIs pointing to compromised WordPress sites and disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery, leveraging a common spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://catamma.ru/uplcv?utm_term=canna+coco+feed+chart+for+weed
    • https://marblobaths.com/app/webroot/img/files/7184770816.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ae0qg0on7s2g90n4n71ap8b8an/damifuxedisulimeno.pdf
    • https://hotelgaric.com/upload/datoteke/31009983627.pdf
    • http://kompletucetnictvi.cz/files/file/luziregada.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a8d57fe899878ccdfcb0ffef3a728596/nuvemigatof.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa3031e5ce---gozazaganibed.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/i75rukhnj16p91g5prus9opob2/59939662919.pdf
    • https://keluargamimpi.com/contents//files/91742149749.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/fn4r4ba7pp6facuh712b2rcmjk/17988695521.pdf
    • http://bobmeetin.com/media/galleries/files/99368340975.pdf
    • http://thegioituigiay.net/uploads/files/gofawozesibavola.pdf
    • http://shiokuda1.com/contents//files/vefadana.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1822779b53---2502473809.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b54cc7c52b4---zekivedapemanevapowukip.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a8ae591fb---53178823556.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/9a031bdff640cbdbb907c06bd5f8cd00/56533886764.pdf
    • http://concilianavarra.com/userfiles/files/dizovonigilumogulerorije.pdf
    • http://commune-bourre.com/userfiles/file/16468021063.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/kipuwejogatigino.pdf
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/disivazul.pdf
    • http://rudolphi.nu/userfiles/file/jewifakidugebazagusax.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53d19dbf18---dejidasupujexemuvejepok.pdf
    • https://gites-les-bardots.com/userfiles/file/gusiseguwuvopofixomifa.pdf
    • https://baobihungphu.com/media/ftp/file/57480229855.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf4.bin
69497f8bc4566280702e74e39cce6fa9c00367391ea839ff7db0a8b0d39f6d5e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 10384 bytes
font_01_sfnt_off00010377.bin
56046eb83b6e1712965d5f7aa05ffbc966a9d55194c95d4fe4b712c0fd9a4de4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10377 16612 bytes
font_02_sfnt_off00012e92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E92 16792 bytes