Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f45227d704f606…

MALICIOUS

PDF

60.8 KB Created: 2021-10-03 01:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2d9a0c29ab623d925cd755348071eaaf SHA-1: 612fe9acfb74bd4a8e14ea41d5dd527e55e25057 SHA-256: c2f45227d704f606f15da42e0ac9de89a24577d57daf22f3d09e7169c9880b9e
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5428

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 http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16134dac9af8c0---97143012923.pdf In PDF document text
    • https://autotronics.vn/userfiles/file/vidubokuzopibisubeb.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/77276716624.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/54028473342.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/23176755141.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/sovazatij.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/dudadamanujikakab.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/76701794494.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152adcab9c79---tuzikivotaluzevituburemi.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/webumuragizozena.pdfIn PDF document text
    • https://beaszemin.com/files/54832040479.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/xenovivik.pdfIn PDF document text
    • https://matrixx.lu/images/gilikogaw.pdfIn PDF document text
    • https://evabizz.com/userfiles/file/fexovov.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/bd4f7056cc8f46fff680a2f5e0b95334/witubajejugufid.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/sagogumixajunewibe.pdfIn PDF document text
    • https://atiksigorta.com/files/nevufufa.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16149a4dee0b39---47514988866.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/vagufivekefujug.pdfIn PDF document text
    • https://curvy.tw/upload/files/65781546964.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/mamudirefixewe.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/fojilixonafa.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/beduxikinomoled.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=relationship+between+logarithmic+and+exponential+functionsPDF 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_off0000b246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB246 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA58 15052 bytes
SHA-256: 994f582b69d125a958837c63c3ceade66a49a3784b55c980b12bfe9109d548be

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