Malicious PDF — malware analysis report

Static analysis result for SHA-256 edcebecd56790728…

MALICIOUS

PDF

62.5 KB Created: 2021-09-17 13:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 0402ff2d9425df913d3ac2ff7901450c SHA-1: d74dfc7c31d809d454025567ef39746f9a1c72b3 SHA-256: edcebecd56790728628b959c88dc7405b08fb306d8788494339aea2e72981549
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites and one directly to an IP address, suggesting it functions as a link farm for phishing or malware distribution. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating a tactic to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7193

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://catamma.ru/uplcv?utm_term=redmi+note+9+setup+in+progress PDF link annotation
    • http://patronusalapitvany.hu/public_html/upload/21748695247.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/pikesutagurasekerujesomu.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/dokilamituxewaruwefi.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/74092171179.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/magepamedokedebabobibivo.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1b5d8222e---51500190753.pdfPDF link annotation
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/20496500806.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/73a96a67ebbb14f46fbfc57e198fa9dc/kusavizotidamuxinozagak.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/82537992611.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b672848728---63331541405.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/29414306500.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/89030deb0adfd2481ae80fd697e10aec/1561663076.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/93615526544.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161407a2513ff6---66573915344.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/pasubodule.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/49336320982.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/35920442745.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613013146d20c---7597140543.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/87361784783.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/tamaxenexib.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/93191177156.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613daf6293a46---73712770339.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbcd4639ce---50519106782.pdfIn PDF document text
    • http://gzbaosui.com/uploadfile/files/gawedebaduxe.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_off0000d6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BD 10840 bytes
SHA-256: 91923bafc403e53c65b26dd07faf01d8c53ea14363785ad821794817882edc6e