Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e2d7d807d1385b…

MALICIOUS

PDF

64.5 KB Created: 2021-09-07 00:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5c83034a752b0243d5f0734bc833f18d SHA-1: 0525095929080ded4c0cb2fbf26a4770fb2bc56f SHA-256: 76e2d7d807d1385b028826051d0c1f8348dab57c2bfb5ad2377e13edb4be3c54
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the final destination. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=applied+stochastic+processes+ming+liao+pdf PDF link annotation
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/e2fb7d4b55daa3beebf0e7baa230baaf/nemezoxemifutetaladekenab.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/92104671256.pdfIn PDF document text
    • http://pneusmarene.it/images/file/kaxupezaduzileketerim.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b41d82e40a---26119955862.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/mojegodamodarog.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ce04f264dba---sunutekupid.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/74785066828.pdfIn PDF document text
    • http://donelreunion.com/clients/5/59/59051ae02fa593b10ab13f41bf6316a1/File/salekebexurevamub.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071438eeb777---loninidowofozabitimo.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/ribadobanexuwilaragugomig.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/91b9c90a3a6c39e661300d56a506dbae/63044711549.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/1oq8g9dhtd9k1a990jdbr28pvo/45346493949.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/5574635172.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/vobozefi.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725f1ad303f---91414676118.pdfIn PDF document text
    • https://luminex.pl/upload/file/jotube.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/tikugaromizegejosoludor.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/71727208979.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f43f6a51e---77624424268.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/65be3b18215c5d16a5b68010425ec1ac/povagixirizawomebidad.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/35926710143.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bb48f9c18fe---22815901869.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/r89bvifn66jeoia8fhq9t6fag7/90218622418.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/1342342626.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1