Malicious PDF — malware analysis report

Static analysis result for SHA-256 901fab9c159c76c9…

MALICIOUS

PDF

96.0 KB Created: 2021-07-08 09:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2adaf7ae37f94ef8f503177d720a8954 SHA-1: 30690288bfb5248296980a1e1864df1edc69f88b SHA-256: 901fab9c159c76c93909cdaf47cfbd0954e6a8e92765fb3c9fec04fb56a4a062
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to facilitate phishing attacks or distribute further malware. The presence of multiple links on compromised CMS upload storage suggests a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6394

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://oniceh.ru/uplcv?utm_term=convey+information+meaning PDF link annotation
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/ed68893fbc988e6c008369f019c9dfe8/jepapijipoda.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/e0a6f73a5cb74a1b923af69480aa1f9c/zisifijaki.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce0898f453---68782000374.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/838f4f69ea6074169b9d6b95790000d6/logugekoruladarilumed.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/a0daeb3cdca6f8fa700175e2c0f7291b/silifip.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de5ab182ef2---54750441462.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/goxodaguzisakefuve.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c947f08060---5859804736.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090505eeb5f9---mokimejifetebofa.pdfIn PDF document text
    • http://changju-hotel.com/CKEdit/upload/files/kaxuruv.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607539b26d336---14226957944.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad24b78fee---31810808531.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ebf2450a3---wejajumik.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2ee73449---pekuxetoxukudidogijunaduf.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096caafe6101---10469064371.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/207b03c65b0a7729aeb543b8b9b85678/givupem.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a703517a3---fuxijuw.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/ecfe621d6fd5eedacf0783ce4a552e98/vixinifujemilujadokata.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/rozopavalosetinatipe.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/97806955449.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/39633403936.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160712d1568f09---nugorefopimezukipupeben.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/30379624631.pdfIn PDF document text
    • https://panama4d.com/contents//files/61818459888.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/famunevapujixi.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_off00013385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13385 10552 bytes
SHA-256: 2e0c8985b54f191e993ed94b49d4e41e218c916300db9b56e58f561a33754c96