Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f517e91b72bcbe…

MALICIOUS

PDF

79.0 KB Created: 2021-09-02 20:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d0a72b083ee511008248587797bcae98 SHA-1: f85d4bc8cbae557b5b63f4f84b2b0eed5f710a4a SHA-256: f0f517e91b72bcbe9b8d904d34af6f1135fe8698e36bd2585a2e72c74c4b9810
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5801

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://fsgpj.com/upfolder/e/files/20210716173620.pdf In PDF document text
    • http://goteneplast.se/files/images/file/30885395983.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/68740003674.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/saxagolasugadaduw.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202106202233175074.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/8a35686560385a07072cb57ee166f44a/joxexasase.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/17768150017.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/46337116960.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a27e4d25e4f---93898855609.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/fateparagedoz.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4f096735a8---lotevi.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a276651e635---vevaluboduxulikutegul.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/25969479852.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07038d5597---kisekisirefo.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/10079359391.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/cf6e8ed6ff8aa7f9553cfdab343f89a8/kaxakozamekojiki.pdfIn PDF document text
    • https://506hlapeta.com/files/file/23271080475.pdfIn PDF document text
    • http://thongthien.vn/upload/files/vomewezijalo.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/79536713172.pdfIn PDF document text
    • http://cmtoolsrental.com/user_img/files/xutetuvaf.pdfIn PDF document text
    • http://mesterek.net/tmp/38056149742.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092699b7e61d---94648772619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=academic+achievement+rating+scale+questionnaire+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/joraxilemezuzikite.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_off00010233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10233 19168 bytes
SHA-256: d2d6b00c9f54dbb2c6d839782923f1b34a6c935fc497d03950bb0568017eebe9

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