Malicious PDF — malware analysis report

Static analysis result for SHA-256 a689490f38824ba4…

MALICIOUS

PDF

69.2 KB Created: 2021-07-16 17:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2d5a7a439a561becbd06a348dca7f48b SHA-1: fe997d61268e2401d32e264936158056cd793c54 SHA-256: a689490f38824ba4918088a678a62e31d09eff76afa8d0ffd991ceb54dd8d29e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. No scripts were extracted, but the presence of multiple suspicious URLs strongly indicates a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8295

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://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4444021a3602bdd743d726508c921e37/niwenoporalidugo.pdf In PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/mirifirowujokovaxap.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/a3ed315e7ff4056ee24f564b8869f4e4/14088297026.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/914e46afc871e6d7747def095f4e4295/93105878116.pdfIn PDF document text
    • http://laiksmodalux.lt/app/webroot/uploads/userfiles/files/43076289654.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/89046865168.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/66hdrr86humkpllr686m6r83n2/manaxidurenuxi.pdfIn PDF document text
    • https://juegosinflablesarizona.com/files/68258145823.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a0972d0c5---sevokiligimab.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083dee233e5f---78309908926.pdfIn PDF document text
    • https://diphong.com/uploads/gevexo.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/cc32f79574933b44887897801bc2c7f6/vepixilibudolig.pdfIn PDF document text
    • http://nineslash.com/user_file/file/537036665.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/20860457389.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/74103738009.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/peramowatenajenus.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df47e65e644---denofal.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/paxidibozutibododaku.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/pobitewolunojidofomaga.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/f2c0d70dfdb0e69aaf693cad8067d46d/18099303941.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ce676fb2f0887791525c5561012e509/fevinovipexewoxejufedavo.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/86919132548.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/489d4c90763d92c2e8427db7d2ed1b4c/kisevedowuvox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=pearson+iit+foundation+physics+class+8+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_off0000d7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C1 11140 bytes
SHA-256: 97e5a8f47385cd90ea5be877855f8e35a5c4ed5895ad59c926d4926361779fae
font_01_sfnt_off0000f1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1