Malicious PDF — malware analysis report

Static analysis result for SHA-256 204d6d4dcc09efbc…

MALICIOUS

PDF

78.0 KB Created: 2021-07-17 06:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 8ca9de35ddebb82054fc1ad7f101a05e SHA-1: f9310543bb76368a30d777038c0cdf4ee8abc8d7 SHA-256: 204d6d4dcc09efbcf46902f2688a8d0bd25d6f0b7ab581fb8f40b88cc7308e0b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the primary attack pattern is the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7403

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://harryreichert.de/uploaded_pics/News/file/bakex.pdf In PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/8611a3462837123e60a2a1594646c575/jozolukamigivukatanuwaxu.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-26/20210526033112240608.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/vituwovinof.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4d0d9c06f---pizexasenigosupowaxigami.pdfIn PDF document text
    • http://wf515345.tw/CKEdit/upload/files/40513493475.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/78041647636.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b436d42b5---gapuzopixur.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ba30114af89---mexuwosunizakop.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/ic2tq8nb1dvqsrs3h0gfhr1j27/59143166441.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/kerotuwuxuvuzil.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608d39732d2d5---963721437.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6df810638fb7b1adaf5db5442a071f9b/vaxul.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/delewudezenulatibifixabos.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/79186091878.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/54878577127.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/34166479684.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/d18cfe693762fa59e856c7b4891e3ddd/tapifurolenovotemet.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e640d656a3---pojixojanezedapam.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ae4e9317f---93961839898.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bba0c29c6ae---47907819007.pdfIn PDF document text
    • http://www.seminariomenorvalencia.com/admin/lib/ckfinder/userfiles/files/sakovumevoxasoru.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/xafavazamipazezaw.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/2757cd8edb4887278d337e172ff237be/21717985376.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=wow+classic+best+dungeon+to+farm+goldPDF 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_off00011d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2D 11140 bytes
SHA-256: 8ffef8ee26eac3e51a45d063b21877a5a900c7237dd7522e3c6eb227ce704192

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