Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c918fa1288028b…

MALICIOUS

PDF

73.4 KB Created: 2021-09-16 02:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 79b6ba8e64f63ad3f88ac5bf59a5cb05 SHA-1: bf723531e6157bdac6c9bb53f11546d2f6a40698 SHA-256: 19c918fa1288028bd8406bc603de145b93cdca21583ab84d0f07a16129edd390
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy to use numerous links for SEO manipulation or to distribute malicious content. The embedded JavaScript likely facilitates the redirection to these malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5898

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=naa+peru+surya+naa+illu+india+full+movie+mx+player PDF link annotation
    • http://bscsaoner.in/ckfinder/userfiles/files/zodamaju.pdfIn PDF document text
    • http://preiss.at/upload_files/files/99954645723.pdfIn PDF document text
    • http://medrea.ru/upload/files/pofoj.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/211d6f78632929334b5d4c0084e4baa7/goxesevaxifipojejapivinar.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/didasitutevoxitebuvomamo.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/virumejofewipika.pdfIn PDF document text
    • http://ilkjv.com/Images/Media/files/povibemosudof.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0e80d62b7---83315394264.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/80560666176.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/xojupe.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/13424645976.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/pexanopisexo.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/64059667233.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/41645570381.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/7765506761.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613586d49241b---fijemudefe.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/68274158364.pdfIn PDF document text
    • https://ancoraeducacion.com/images/dazogel.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/16614417968.pdfIn PDF document text
    • https://nordiskvillaventilation.dk/userfiles/file/vudamawobarupifudexuwuvup.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/79169560892.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b23c1ea39---zodozokokalewenadixuwesi.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f103ca0e7---radesagewimofujiguduref.pdfIn PDF document text
    • 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_off0000d777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD777 10920 bytes
SHA-256: e1bd59860b445d88745e5a74e91da7b6e1512828e8628756b2f6a6ffb6a9fb48
font_01_sfnt_off0000f0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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