Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6cbed1b23ea64f…

MALICIOUS

PDF

102.6 KB Created: 2021-09-08 04:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c8747a029c6e27960a96a81c727f7a06 SHA-1: ffd8930ede98f3f545c4118a400dbe4018d37287 SHA-256: 7a6cbed1b23ea64f0b97dc40fa1e04b08081b9b9a7d629c7482dc403f8bef5dc
154 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload directories and other potentially malicious sites. The PDF's structure and the nature of the linked URLs suggest it is used to distribute further malicious content or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6036

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 http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c518aafd---lamaxagixamumavupajoxanu.pdf In PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210827_BE2E7C6B3FE2E21F.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083713352c45---gazugikekotegegovifog.pdfIn PDF document text
    • https://www.verimevzabavu.cz/ckfinder/userfiles/files/86503500370.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/3a21806f51f34c941d5506725f60b1e1/77979153963.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/558094137.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/30918742159.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/faxurumenunomusitezuf.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/ziwifusigomafo.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/1734a091358b8d96a0be3de5be09d0ce/zopagajivugad.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/nexob.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/bobemoneteza.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/84060708073.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/89852243090.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/sulajewi.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/zakiziluviforinagaruzagiw.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/79100184194.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dd8314fb7---6371681972.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/vizivarebofilazaf.pdfIn PDF document text
    • http://halanmilk.com/upload/files/74916569765.pdfIn PDF document text
    • http://sigep60s-ncbeta.com/clients/44785/File/livodogepekurol.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/81430638253.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/71402062833.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/kasilareponofelorul.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/9452438360.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=derecho+procesal+laboral+pdf+unamPDF link annotation
    • 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_off00015d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D50 20556 bytes
SHA-256: 8962a5bd68911a94a5f74c645dea463d24d5b9e2b74ceaf85eba89b99679430e