Malicious PDF — malware analysis report

Static analysis result for SHA-256 c050a8ec87659fc2…

MALICIOUS

PDF

62.3 KB Created: 2021-07-02 11:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 733fcca2cf70e089f2de92b7a76f1a6e SHA-1: d56faf3efcc297235b5263dd73131de4b7b60ffe SHA-256: c050a8ec87659fc24f1fab375a2ab9953470362949285772f5ba84c48dd1adf9
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The presence of multiple distinct hosts and UTM parameters in the URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9100

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://pixomot.ru/uplcv?utm_term=drop+factor+for+blood+transfusion+set PDF link annotation
    • http://17njl.com/userfiles/files/54163250815.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090305bd7352---zabadibazutu.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/56645822280.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/m5mcuejfqgjr103fltd919dp20/pepim.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/29b2e04d979e268cba7508f01a660aee/raxarabaridinagorenena.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160866ab34fa3e---788439986.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc7612ae11---rebeteva.pdfIn PDF document text
    • https://inncredel.com/uploads/64528763657.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/b27bff0062255e3a97b7d46af0863bc0/58157780477.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/7045210885.pdfIn PDF document text
    • http://rotang.net/userfiles/file/71560034729.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/d4253b9d5131bd678735a5471490c3fc/13698118279.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/efjaehhmvl3cs3esk3rsdbvbsb/62801441248.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/eo3otrrclc9rptt97aie26are1/23256935395.pdfIn PDF document text
    • http://lhsclassof1971.com/clients/74120/File/21224297887.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/ur57hsapk8eu8vh5r4d6i1o6ji/91403440508.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/89615712872.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/010626111476.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/gidoninit.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607387da7fdb6---88392486438.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/98818504617.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/2b918f2728bf2f8fbfbc961d500460ee/98052431595.pdfIn PDF document text
    • https://italvaping.com/file/vurozonen.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/97691338633.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_off0000d3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AE 10856 bytes
SHA-256: 32587b8383b146c8af9edf77ccf8ecca42976820507dc1efeef0aac63cc5f9f8