Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ee7bc0d0e5bd5e…

MALICIOUS

PDF

86.0 KB Created: 2021-09-05 17:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a2e3b64f3c2dbd029316c9b7fb746b8f SHA-1: b4b69b33e302d6fa5582fcc12a2a5a47cad472e9 SHA-256: b5ee7bc0d0e5bd5ea744e8a3cca9f8d9535ac22094abd8f406fd5e4f755781e0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to external resources. Several of these URLs are hosted on compromised CMS uploads or disposable domains, indicating a potential distribution point for malicious content or phishing lures. The PDF's structure and the nature of the linked sites suggest an attempt to direct users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier clean score 0.2364

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://aivieksteslaivas.lv/userfiles/file/75836152361.pdf In PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/83770ad11d68eef729005e84bbb09b46/vugokixakuluxapinojusuwal.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/26256791285.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/3ddd5e5086f9bf6406b2662f4c0e8caf/tigezipukivu.pdfIn PDF document text
    • http://qdjshg.com/files/file/42827836617.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16116b7f68643c---weramu.pdfIn PDF document text
    • http://poornasreehomeoclinic.com/ckfinder/userfiles/files/mojowofa.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/gusanoweboteminelokikuvog.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/musosufumaret.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160714a3e25a24---nupaxirun.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/zetoxewonupizadanuf.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c247c886ab---69424202161.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/48677258767.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3aaefdb36a---jijami.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/6469d49f27b7016629f017398b1920c8/82504640843.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2007b8f710---bupepulaxiwugerolu.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/43504499104.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/kfjhvab4rqtpou74dpm2vaqnl2/18647616723.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/726710479.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/saxepovedibetuwewef.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/22357108414.pdfIn PDF document text
    • http://yujinpharma.com/upload/files/58009199720.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/dipakatagajabivodoxelow.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/e6507ac2cded727996ab8e9f5e4772e7/jatixanawakodoxulul.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/polojivasugusokamalefibar.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021062409033773499.pdfIn PDF document text
    • https://webhosting4.net/media/file/25042538948.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=human+molecular+genetics+book+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F62 11284 bytes
SHA-256: 02ba501f6508586990c2e2e49f978b83b92e4ad08e525eb27f98154c0b21d837
font_01_sfnt_off00012967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12967 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1