Malicious PDF — malware analysis report

Static analysis result for SHA-256 72537aea22b23c15…

MALICIOUS

PDF

99.9 KB Created: 2021-08-20 16:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a1425ba870cb3c20207c287954fc3368 SHA-1: 2fc1e611514f2f49d4352a2819fbd397d70aaf19 SHA-256: 72537aea22b23c15bad93d0c0f9d0e5dad7cbf308d0fb5cb030d4e8ed1c45724
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3429

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://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa87da08615---xewogisepomit.pdf In PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/wijetoledo.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/61548342509.pdfIn PDF document text
    • http://houselandia.ru/files/8333728525.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/21708180133.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/c94692aa4e742852a31b1eea150a07bf/69369165642.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/fe8b6d41a1bed64ea24f76516550ee6a/24921895280.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6e2cb8172b276ade6315ba7fd731d06c/22933362061.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/50a3ef36fc3494d1c7f94b3391541e5d/dobukifatawoxonekuti.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/99649883976.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/53409886782.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160974982c290e---nikasotejazifamalijat.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/5090074351.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3cf93fc629a066573e207b5117a8d6f4/wurapotijepupo.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf921286923---90620660392.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/7b41dd133801dd4cec8651ca3c522c9b/pulovuguwaweb.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/lezijanasabisipaxavagurar.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f54807a99f---84720035293.pdfIn PDF document text
    • https://equinox-e.com/upload/files/57393716847.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/01b993b75f95b1792e1d7a8d2ff7605b/58414914116.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/84128328297.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/77613600565.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d4513e06146---dufedonuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=%D0%BF%D1%80%D0%B0%D0%BA%D1%82%D0%B8%D0%BA%D1%83%D0%BC+%D0%BF%D0%BE+%D1%80%D0%B5%D1%88%D0%B5%D0%BD%D0%B8%D1%8E+%D0%BA%D0%B2%D0%B0%D0%B4%D1%80%D0%B0%D1%82%D0%BD%D1%8B%D1%85+%D0%BD%D0%B5%D1%80%D0%B0%D0%B2%D0%B5%D0%BD%D1%81%D1%82%D0%B2+9+%D0%BA%D0%BB%D0%B0%D1%81%D1%81PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001262d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262D 11340 bytes
SHA-256: 636c4c76afa1b484476e3e70d856b9f2843e65f14ddcc34a09eceda7ac636c70
font_01_sfnt_off0001408a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1408A 23736 bytes
SHA-256: 637a48b8181de6831dc74fecf33ecbb28fd697219ba3e82ec254fbc95d622999
font_02_sfnt_off00017ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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