Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5a983a11c8a421…

MALICIOUS

PDF

73.5 KB Created: 2021-08-16 23:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 00029b62a4b972f6f19adb552e850670 SHA-1: 2a9036ba211bed2fb2677db0b007fa9476d64d77 SHA-256: ae5a983a11c8a421e422f4f054ae0de0768c38f3d8db55caa2cbc44e6f15071d
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised websites, likely to lure users into downloading further malware or engaging in phishing activities. The presence of multiple links on disposable hosting and compromised CMS upload storage indicates a deliberate effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5307

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://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/a070d4b9abf3e59ec800113dd4a57612/4052421125.pdf In PDF document text
    • http://air-ned.com/uploads/files/87992555453.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/78948473760.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/21504172858.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/3a3bbe64b95d5c3ee964d4921411a7b4/24043767453.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/sofekojib.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4af40b39b5---tizosisenajejixo.pdfIn PDF document text
    • https://norservis.info/files/files/62891632982.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/vedowevugojedigoxeraw.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/84641784082.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc4b8df1d9---25320177616.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/f2be6cc06e55bee3b6d21b569df53483/lesemag.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a915852efd7f68894542c7ec65f31c5d/rorijetedu.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d3868e26c74---pesexaruvupubataw.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/2e961be7ccccddedb23a897be168a01f/jadirujikunidazedo.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091788085701---40236454363.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/96877792188.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/90083286285.pdfIn PDF document text
    • https://projetovm.com/uploads/files/botepafulapituxuduromit.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/26313962858.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/s8kfk5q9d6kr52m92pui7mt4a7/9826920017.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/e137c14172eb8887695bc47bd691114e/dizivogovefugiveg.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/siguvazoxebezorizivile.pdfIn PDF document text
    • http://crmrealty360degree.in/ci/userfiles/files/xerilu.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/tidisatalujos.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/504d41864ee9b74ccb8bb027d672acbe/wazesuviponupipanevedevo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=ravel+bolero+sheet+music+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_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 16696 bytes
SHA-256: b5f434e01ba5e6d354c2c26a4f23f463964c67d7ea4a2f730be377e55a024b83
font_01_sfnt_off00010e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1