Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d776ee6e957a48…

MALICIOUS

PDF

78.1 KB Created: 2021-09-06 09:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 04e3f26b0684f9dec25db7ecc5c1b5f6 SHA-1: 6b28bff3f0e7e8386c8e83480784f6d9a198d117 SHA-256: 96d776ee6e957a4875ff57ae0a0158a7bc7746d0eee4f693a0d0f544cc8c9d93
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a phishing or spamming operation. The ML classifier and ClamAV detection further support its malicious nature, likely as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8417

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 http://sportsclinicwest.ie/media/contents/file/65606939325.pdf In PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc634228264---bisobozudonisil.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/a6e2b24f7627b48876b7233346a8b794/sebunumupakumozaxopekilig.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/51251226184.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-4-29/20210429163054889575.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b172c2ab8---8543762112.pdfIn PDF document text
    • http://tipiland.net/upload/file/fowezajabowosomi.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/84634491683.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/robowamojotuvuko.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/81756085003.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cee3b9e803---80337705954.pdfIn PDF document text
    • https://club-sports.net/uploads/products/files/lejefarel.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/xeneguwiroduxilefodazu.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/morixanusaf.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/69336507725.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/472604a26c57ed580f5751055caa6ff1/9198003519.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/h78h1tjh3munujb9fkou4koof5/29739303638.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/lutuwoxedeloxaxabejo.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/64359393571.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/jufomazaj.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9107227e00---56512050834.pdfIn PDF document text
    • http://adice-area.com/pictures/files/wetizuvupanilerajivo.pdfIn PDF document text
    • https://vinniescustoms.com/userfiles/files/26686460310.pdfIn PDF document text
    • https://amgaa.org/temp//files/sudutuxo.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/filuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=portnoy%27s+complaint+pdf+espa%C3%B1olPDF link annotation
    • 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_off0000ed90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED90 19228 bytes
SHA-256: 0c48cc58f457fbb0df8e97b9ba13ca5caa8c79704b1531c832974b9206de884b
font_01_sfnt_off00011f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F90 11136 bytes
SHA-256: 606b4cc35dbe79edf9dfe3d987d30ea0e0bedceb79b994c5edd29f63c8a86e1d

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