Malicious PDF — malware analysis report

Static analysis result for SHA-256 d005ba3982b71e9a…

MALICIOUS

PDF

87.3 KB Created: 2021-07-19 18:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 85f8d3aa1597df42cfaefe75eac7da1b SHA-1: c92465cf0fe6451b4bf1ad268d23f6faa1faae05 SHA-256: d005ba3982b71e9a5476a1687b9eb4ab275a8115378c0647e06e860f598685e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. While no scripts were explicitly extracted, the nature of the link farm and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5916

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://aldea.work/wp-content/plugins/super-forms/uploads/php/files/306cce67f5644807c5e63599cd31869a/jegirelotamifozozij.pdf In PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/4c783d77e70f11b42e6999b3424f77e2/zogat.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/cf9b092462c283dfae901f995e7209c4/siwejewe.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/d746607555f43e06c4d265c9bdab7510/12145753032.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/kututomorabugusitib.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb79e90438---jedakodefizesolu.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/9ec373cf9750f7a444e1db70181b23ce/53330012998.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/aot35bubmk94mm02bjls1mef93/refexomigudodi.pdfIn PDF document text
    • http://chieucoingason.vn/files/tezewuferorefataxulibidam.pdfIn PDF document text
    • http://zzweien.com/d/files/jodetimevitemevurilo.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee6b718148b---ligodulonokenazafu.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fc1dac45d---65020039711.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073c8ae5be79---11465663539.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/mizedabugikikonazos.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/zolutotezexidugev.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a371c11b8---roremij.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/8ccf44a39dd2915a5838eba6c17b5934/xosekidej.pdfIn PDF document text
    • http://apvn.info/userfiles/file/xajowidomuwiba.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/5f2d44086e55678ba9eb530d1cb3538a/dolakigisosigumerafid.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/m88f4cu78civ0k665bkt5fufu2/52902772177.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/926ab51dbbdbf1bc0dfb24dee47f1a4f/80372079594.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/gawulukevofolik.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/m90eeavdi51flrihum4kafoh04/bidaniketubonaranuwiladi.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/xegokelenekunofomegefo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=merge+dragons+eventPDF 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_off000116d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D4 18628 bytes
SHA-256: 67700553ee5d176c4a1eda8aada2d32c1f4018f0ee5c3f9a00f12746d4a74bf1
font_01_sfnt_off00014720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14720 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1