Malicious PDF — malware analysis report

Static analysis result for SHA-256 4216e540fcc698ec…

MALICIOUS

PDF

81.1 KB Created: 2021-09-08 04:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3aabab1dfb1bf49a1f9b59627f21131f SHA-1: f8f0160f86be33b43ccf369ec1a243f2f73049ce SHA-256: 4216e540fcc698ec871a366820ae30d743fade399ec1ed622942faf990ab38f1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5840

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 https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/82e3dc11cef89280b454afd9bd20fa7e/logobeliparizon.pdf In PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611bc0c070c9c---79380271952.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16124a46fdecb8---zibiwopilisesikito.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/mazosogoninojumoruraruzeb.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/84191203559.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/jifavorebapavekisusawine.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/pubiworapux.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612bee74e92ab---51530552068.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202108190909586831.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8e27df985---51926294411.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/5ef61be1d67410ec4ad15e85cc92c7d2/ferazovidexe.pdfIn PDF document text
    • http://dejede.com/userfiles/file/30363586982.pdfIn PDF document text
    • http://01host.ru/userfiles/files/jodav.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8047ed834---18633694073.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/23159179712.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/bt1h4qd2rnk67nqomdggtfn5b1/86021436805.pdfIn PDF document text
    • https://ip-pharma.net/data/files/39801639686.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/37e5a98d5176285ab1f93e47a6bf009b/41101770917.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/bipilimuk.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132ddbd7bc9e---88948368574.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/69446880474.pdfIn PDF document text
    • http://gro-felix.si/uploads/molukenegu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=audiolab+8200a+user+manualPDF 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_off0000e868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE868 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001007a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007A 17992 bytes
SHA-256: 551138d805e5da536f6d03b046216a7a079e46c85e5de608031ce0143a7a117d
font_02_sfnt_off00012f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7A 10984 bytes
SHA-256: 65f2cd1b29e0643bd6b64c221d68c267b70ebd5d6f29008e31d5003910ef39f9