Malicious PDF — malware analysis report

Static analysis result for SHA-256 7966e5fffa10194f…

MALICIOUS

PDF

78.0 KB Created: 2021-07-04 13:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3bd29abda0f33bcf5a6fd322486d79f6 SHA-1: 9b1090db99db6f6def0f97a4f3347d5c9a801ad3 SHA-256: 7966e5fffa10194f8e2e9a589ff30f2408bbf7c18ae0114c9a50f947c0149449
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of links, many of which point to compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. The presence of multiple links on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4580

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://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/1d0cba41b0db4d22b7f498a3c3a92afc/38577220283.pdf In PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2854d61108---30657190279.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076da042ade3---fafevebibemofojiwu.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/57852197459.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/64738981309.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a0469a1fb---bafaribazozobelunekase.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/xiverotuwezame.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/95d4e76462df1d41e5b013485ad18783/fozekiw.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/983e396a40869fbbe83572cb66b0bc52/nagofobedemuf.pdfIn PDF document text
    • https://personnelcle.com/userfiles/file/zafufigamezow.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cfec9e601---tojusavow.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16082ec6dd405a---nulugevulinevepomupelo.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/a12438404e53c9f52fae86f23cf9c264/femenunaw.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/furamugo.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7d4270271---75503130932.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210625073748_jopjdi.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077bfeee1cf7---34772560070.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/posagigedosaxisolakawum.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/6hg1k497gihq2o6ti9to2pfov5/xokusudibosaxumewo.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210525014825486.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/15628c84894eb4eb79d7fee9a974c4f2/3425287122.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/eth7em0t1unikdcrunlle7nv76/subop.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5877cc78a4---gefepanusififereditizugeg.pdfIn PDF document text
    • https://webmenuplus.com/images/file/69075353197.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=what+fluid+comes+out+when+your+water+breaksPDF 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_off0000eb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001034c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034C 11268 bytes
SHA-256: f4b316d99dd14d14c161e7dd749cac46bf8f1f3fd847a372554f764990d430e2