Malicious PDF — malware analysis report

Static analysis result for SHA-256 9979f7c85533c0dd…

MALICIOUS

PDF

65.6 KB Created: 2021-09-25 11:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ebce96220c84d8e220fa1a7cb1654ddb SHA-1: 42ad1e4c7a3169a538dd9207fd53e8548297843a SHA-256: 9979f7c85533c0ddb408f2cbcf1aad02338796b290c196975516d0f42dd6ee4e
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. The embedded URLs and the nature of the heuristics point towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5956

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://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614125c0aa4cb---32802886754.pdf In PDF document text
    • http://tribo.kz/userfiles/File/nurogokikobabelodifa.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/rikofa.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16136475cd7dda---63970526757.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/56387629558.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146f0b97cf8d---71430902957.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/vofuxuvotawidojoj.pdfIn PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/76720584631.pdfIn PDF document text
    • http://jlsxjy.com/right/UploadFile/file///2021092111532073499.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/pokasarikivimi.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/355076082.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/97337009131.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/e25005208f771916721f3802121a83f9/89868923841.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c6f3aa23a---45047007224.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/b113a806739b183c39c370838d8a712e/37952776323.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210923163237120619.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c273f3bb67---rodudukasom.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/pajijerow.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/boderorazapamigodaxomon.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109112154097181.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/xuvawepul.pdfIn PDF document text
    • https://orrizon.ru/images/file/kogajuwuselagatixugidese.pdfIn PDF document text
    • http://sfalojistik.com/userfiles/file/fizukimadepadamopug.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161443d02c16a5---65599258185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=csr2+hacks+androidPDF 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_off0000b522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB522 17676 bytes
SHA-256: 999c70f8bcc7babbb7b46db8263d9362d5074c84a30a78301e5b5c30d6c8f00c
font_01_sfnt_off0000e277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE277 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.