Malicious PDF — malware analysis report

Static analysis result for SHA-256 5900de47d9d23618…

MALICIOUS

PDF

77.9 KB Created: 2021-08-19 10:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a8bab6659c4f26d9c7e72fbba15a5071 SHA-1: 2834d2f45c82dbf657e728d52e403125ca28b553 SHA-256: 5900de47d9d236183dd303dbf674ae89b937dee00a5ee2715aba15a2f600da7b
124 Risk Score

Malware Insights

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

The PDF file is detected as a phishing trojan by ClamAV. It contains numerous links, many pointing to compromised WordPress sites, designed to host malicious files. The lure appears to be a 'free Kawasaki Bayou 400 4x4 repair manual PDF', indicating a phishing attempt to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4332

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://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3158429644---xipojiwirilurajufedel.pdf In PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/55240126156.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16046487607.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fff70ddeadd---lebaxajovojexed.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/xukalofawefot.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4b3b707e6---40269939268.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076ceed1097e---nozit.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/57146861651.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/78103103588.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/11bef26b13e0e70c62be6f1587b8521e/lewajofuwupak.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210802102428.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/74233889135.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/72555305100.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/28e2a56f53518e9afce7f5b01db00191/87062906921.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/004v3lq1qc2pdkab0lgms61jp3/runitulorito.pdfIn PDF document text
    • http://nsureunion.com/clients/71556/File/71398126938.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/63421083556.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc6f151025---53327035421.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b43990d78e8---kujozutexeposugirujo.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/vatezufuv.pdfIn PDF document text
    • http://hutergroup.de/userfiles/file/bapipunawegadeba.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/43171197333.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702daa0bfde---jesosulokoneti.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/rozutafap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=free+kawasaki+bayou+400+4x4+repair+manual+pdfPDF 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_off0000ee81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 11372 bytes
SHA-256: f1df8ed85945f7105b051149c6bc43ae7af64e6cb5a6abfade1e87720474a235
font_01_sfnt_off00010918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 16244 bytes
SHA-256: 92b83296782a2bd472b41721386bba4d48cdc61a14ddad9e1d30eda41184c070
font_02_sfnt_off00011f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1