Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0a4d5175180ec1…

MALICIOUS

PDF

69.3 KB Created: 2021-07-23 18:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3a146a7cd6312fe8207dab5cd8e601e2 SHA-1: 1d5310e57d5f106ee02aaadfba4ed5278b905d8d SHA-256: bd0a4d5175180ec1978ff0ea5b7a0056ea45692002712de959ed823c15a8d2f5
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm for SEO manipulation or malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9032

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/davesorogalalujugogumupov.pdf In PDF document text
    • http://brkvinc.com/userfiles/file/31342854648.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/15523863149.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a272d758259---soxatenilexakomejokibo.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a5893b38a---kelapevobexe.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702ce4c5043---rogojogax.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/pozoxasin.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/64795443070.pdfIn PDF document text
    • http://washburnhs64.com/clients/f/f7/f75dc469904bb25755ea64d7551c4a95/File/vuxewa.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/tehskthqu147eunhmdt4uhvba0/majekokola.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/0b521e8c2982f92451976a6fdf7f3a13/kunujedezonibuwidusa.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/95852705787.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16085360024807---606863924.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c65f0d2a69---39461984722.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/safonivivebusa.pdfIn PDF document text
    • https://le27.fr/docs/file/ridodigojogiv.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/mujedepavagusaxuforawa.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/77360733541.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/e5tb7ugmnitmkpgr93rvf6ikvo/50689841154.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/libax.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/uciddmha9fmp84p6qs662ctrtg/dekib.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608328c581660---54644511754.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/07/15/file/wiwoxiremifidumiminul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=what+is+my+remington+model+11+worthPDF 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_off0000eeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB8 10940 bytes
SHA-256: e38a29dc665a7628b32782a7faf871c3841625ca5f05195f5d0546cf2794b52f

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