Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92b027ea9d8d208…

MALICIOUS

PDF

80.4 KB Created: 2021-06-29 09:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5b7bf658d84d9b1ac99f73b0ad400877 SHA-1: dedabe85bb6d30f2a1530e7e6dadadad6506c1a9 SHA-256: e92b027ea9d8d20862131db1f703d106dccf8c957a74ef4397b45fb5a9fd0dd9
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links pointing to compromised websites, which in turn host other PDF files. This suggests a link farm or redirection mechanism designed to lead users to malicious content. The ML classifier also flagged this PDF as malicious, indicating a high probability of harmful intent. No scripts were extracted, but the structure implies a potential for exploitation or phishing through the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6083

Heuristics 4

  • 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://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ced1a02162---dofutega.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89cb216d49---zesiduwakiwegujokeb.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/lafasusa.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/timefifoji.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910afaa7b9c---66314285274.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/402b52c85bea2f6c76871bdf8e577f24/fugebiwi.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/86abdee0581242e3e32e07f1d2ea5656/77711532288.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/3gcmt8upqu5u8511dv3a3vjg9c/58635469433.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/88006652048.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/38392392364.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/81867951777.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/masiw.pdfIn PDF document text
    • http://sfera-vlad.ru/img/file/8083162901.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/93635699558.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077811e8fe5c---95349437588.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/savibomugudejoxepuzog.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210621103205.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/dumomufofalapukajum.pdfIn PDF document text
    • http://debten.net/UserFiles/File/mavojagedota.pdfIn PDF document text
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/75010292450.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1eef1650e---22565208608.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/28904743174.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c781cdf4f6679b137c6cea4d1220533d/bobotokodin.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabf4888c5b---fixajikejajalodemumoxa.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0adeb25e41---66334339058.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+measurement+of+how+much+mass+is+contained+in+a+given+volume+is+calledPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B7 17180 bytes
SHA-256: 4648670f0654f3412fc39e50efd05f492ec31aa509514321fbeb698d5341c0bb