Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fc36feb39c3bb1…

MALICIOUS

PDF

64.7 KB Created: 2021-09-06 03:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 53ba62dd4f0d1d3ef9321f45a4976a6e SHA-1: 3e979b87273905c9e1f184336fa2e7bd853a7205 SHA-256: 26fc36feb39c3bb1043d1095ae9aca01ad98d73a637cba7f0ced147f79a46333
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS uploads. This pattern is commonly used to distribute phishing content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4625

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 https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ji7itk2fmjuu0b9ffot79fs4na/dujuxaxexuzogas.pdf In PDF document text
    • https://rowadalbyt.com/userfiles/files/55487444195.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/2809003688.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/34e138fef4ccd6a1104ed73ecf79b6cc/39426645067.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/qp4ietsgallsdioj3p8j3f4p1b/devetup.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/vapudajonixiwipifune.pdfIn PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/92882670892.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb73db7f2f---pumumunulitusenago.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/puxazabezopo.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/57741728d2cbbcf535095d5c86e83703/17353787213.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a455e79768---84271219840.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/xijud.pdfIn PDF document text
    • https://ysh.my/userfiles/file/41567899820.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c6fd98752---1552294255.pdfIn PDF document text
    • http://heureka-cz.eu/files/zegojapawovegomoziwezetix.pdfIn PDF document text
    • https://buyafranchise.org/files/files/xamokarilirejukoke.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/zizunomatesik.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610579ae81e35---sogib.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/jojozisonifuduxenixo.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/21505920888.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/37e6cc2d63f7d6cd8d615461a0716423/96307486400.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/mifixagixaludotozaruno.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/zuzepuzil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=harmonic+intervals+pdfPDF 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_off0000c22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC22F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA46 10840 bytes
SHA-256: 8424f08327f73f3c4207b52ad403fc4bbf8f9dda308342b2d075bb3f9105388e

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