Malicious PDF — malware analysis report

Static analysis result for SHA-256 6263123dd2950787…

MALICIOUS

PDF

65.4 KB Created: 2021-06-30 23:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 51c3af24c064511ecba2505ecc19965c SHA-1: 8712d120e6785ac5fb58104cb4bc6f55a6a79a27 SHA-256: 6263123dd2950787299a3cde5e14d8e8dc1e4c7fa3eb4a594c7d668b34d289f6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was detected by ClamAV as 'Pdf.Phishing.Trojan'. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These sites likely host further malicious content or phishing lures, aiming to trick users into clicking through. The presence of multiple compromised CMS upload links indicates a pattern of hosting malicious files on legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4613

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://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df93ea9816---kizuberegeluv.pdf In PDF document text
    • http://appletechsolutions.com/userfiles/file/12217282488.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/rupitowazutuxaxekizefi.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/9b771e2d4e4b392b967a89dc77711697/55402801205.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/48902641730.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/ec8f5d15736c5731f9cf789d1655b677/11765578179.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/64027507332.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/uhmdq29me01v59gog7ic6i4ns2/novutonotewaso.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/ramabeseki.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/552b62a0bbb0ab674be3d64a764b5bb9/47792411511.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4208a82c4---73136827294.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/41ae6c45c3c955168541361c4aebbc13/kulovo.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/se1drccinikkppfpcesfibeen7/34710465976.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/j1v9vof6mt3c3fu3nd3a6jjtht/muzitisubatazewipoj.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/34207b3629a258ac30a57fa73d72fe9b/209767755.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/20159505475.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/75pn5jtgoqidt3t71ntapl79kt/85127877473.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/faf278fa868bdb6f51e153df6821a66f/pezekope.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/6057da38dd9ad30392677eb7c1aaafba/8224881442.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/2aff2664923657b00447bb8d2d7b1b52/sevoniziba.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f962f1a53f030fffbc8c9ca118009c2c/zawejezuluveni.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/kalojazuvekedipuru.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/ckl18a29n98p2rkokq7betpghc/waguradeduzekoper.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/djib3bv15s7haij546kmclr42i/31521927113.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3bea4c7f38---2829274477.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f05b524431---xeloxabujeloxibenejeve.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aabe99e39---besasegexesanoruxexoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=php+check+special+characters+in+stringPDF 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_off0000be5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD673 10628 bytes
SHA-256: 6a38276339e496cbc3ea81fd2d83edbbdcdab759116a1a1e6d5d02f4904bb75d