Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc007eab340a963…

MALICIOUS

PDF

78.1 KB Created: 2021-07-02 08:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 51e712f15636de5ec313eaca01e2990c SHA-1: 7a9d154e4fe4e09a83c714af1a10973eb481c266 SHA-256: ebc007eab340a963bed1467dacf6c2647dad2e473b8828590a6b2fe74f84f5e1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs pointing to compromised websites, indicating it functions as a link farm. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. No scripts were extracted, but the presence of multiple external URIs and the heuristic firings related to link farms and compromised CMS uploads support a phishing or malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4578

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 https://allytemp.ru/uplcv?utm_term=miss+waldron%27s+red+colobus+monkey PDF link annotation
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608736ff834d0---43212512629.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e010ca63e---15637600698.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4ed035bc87c7508aa08b40e7c67f78cf/kevajamabixirivetak.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075030c467cb---62590746205.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/puraridosepemamizen.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094fa7e36af5---rokilosut.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/65a90058da6d299a9552d3550b4f24e7/zokiwumelamaja.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827201e7099---98744342709.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/f007b4574d07fdca85ec2f3c2c53a419/65682021385.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160759ab51478f---26791049874.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a3ec1d499---xenegogalipotelusubebot.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/77ec29b7fe3202eb564a08c099bef1df/mudejisefabikopokikul.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/4461651292.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/fafosoragipimewaxumirirak.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3d88f62f757464ffab77bf97c2bf3f14/9889781552.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/67877186648.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/88271366354.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/92adb015279faf902a1749bf7a1c2d94/sugosujajuvuluruz.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d85d74af31---kixab.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/86845834769.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16079f5825c4fc---tidonixotegetavan.pdfIn PDF document text
    • https://abeess.com/userfiles/file/gegitaxotuxudo.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d840997c68---86430194321.pdfIn PDF document text
    • 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_off0000ec98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 17632 bytes
SHA-256: 44826231d02275b6a535e82ad0b9c4987cd7a3a5b448ca7b4bc77ca11fc25be4
font_01_sfnt_off00011a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1