Malicious PDF — malware analysis report

Static analysis result for SHA-256 824b1ddd69e233c1…

MALICIOUS

PDF

59.8 KB Created: 2021-09-02 23:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 22f201283f40a2ffc7f0e752c2f7313d SHA-1: 2f58c200fe785cedaa9e778afe8659d9164483fd SHA-256: 824b1ddd69e233c13cbdf6a79ff692a134ca913166babedd9b64f4e46bb83769
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories. The ClamAV detection and ML classifier indicate malicious intent, likely to redirect users to phishing sites or download further malware. The document body is heavily obfuscated and does not provide clear textual content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

Heuristics 5

  • 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.
  • 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://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850c65e894e---mekafimedulug.pdf In PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/75944900973.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/161044c4552fb1---mafowuxulorotosomujave.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/18004871653.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/8bd149d337227bcf547318c1c6d72803/50890180908.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/lezaxoxovegotujobej.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/54258666921.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/5403459337.pdfIn PDF document text
    • http://ildong.org/sa_upload/userfiles/file/20210810101018.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/doranefijobini.pdfIn PDF document text
    • http://dges.in/userfiles/file/33943753579.pdfIn PDF document text
    • http://tencanpowder.com/d/files/49065368564.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/a3ff8101f60aa3947516ee0083f36c55/gidejipit.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/ledasu.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/wesuxutovojaguraresokired.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/77907786312.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/99257155271.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/4d0223b0447f93e3c898bb5a9e801df7/degapivogapodejujesazuno.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/ce73bca0858eded541356eeb05a5f1fb/dasurawevaweromomifi.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/45c26353fac3898476de286af3b95003/gelodupixalirafagijemo.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///208811767.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/57f4bcc4rui9s2trshkse4h850/61574896509.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/fipoteruxasoniw.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/4ov94qdn8su40u61p7m3e0n7p7/65853688246.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/40463992867.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=acute+glomerulonephritis+post+streptococcal+infection+pdfPDF link annotation

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