Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef8e02837ecb759…

MALICIOUS

PDF

75.6 KB Created: 2021-09-06 19:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 866a98dc6ba44ca573f1b454488aa7a2 SHA-1: dad32a2996f330e51a72f609e94e027947d3c32d SHA-256: eef8e02837ecb759311ef335723dde4d9981defaa86039dab8e1131a4064ddb1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a link farm directing users to multiple websites, many of which are hosted on compromised CMS upload directories. The ClamAV detection indicates this is a known phishing or trojan PDF. The primary attack pattern involves luring users to click on these links, likely leading to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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 http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2f75c0308---furoxopimawomubiwewisid.pdf In PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740bb61f002---39979338104.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/22003041069.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/radikoliwevelivif.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/998e1f8a96b40750e7fc1f418a087415/gixozowuxuga.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/14071949348.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/jikuroxetikosofaresirur.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/260a9beb8b2341bead05974a58b323a0/paxazi.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/61046021990.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/botaviwu.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/89221186875.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/4642ecf44266a3dbe6b3843ec52009e2/19669626874.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/84432963209.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/720b58fc8afff6ba08c202343577331e/99006392745.pdfIn PDF document text
    • https://www.loisirs-auto-occasion.fr/ckfinder/userfiles/files/40417356644.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bc4a38b4d---94444633093.pdfIn PDF document text
    • https://solturism.ro/images/file/ropuzalonowaridutimup.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/jemaselinejusabo.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d9c4e0864a2---dukobetitexalamizik.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/fedorovalonilibutudijojul.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8281b607f---rapogaleniluzagokej.pdfIn PDF document text
    • http://beateromer.com/bilder/file/potaziwajifirisi.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/35bt0u5u4g8g0pqkhmqrm7mt0c/87316721742.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=urgent+care+vs+er+pdfPDF 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_off0000d5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E7 19708 bytes
SHA-256: ed3d947660f2e3881519a6f2d761526e206f86534dac02b934fc374cf7eb2308
font_01_sfnt_off000107bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BF 10608 bytes
SHA-256: 6b00e63da16fbb7f3b9d70145fc10f092bde1f35b35f6af832c0e043f6d78e6a

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