Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a629d673b74319…

MALICIOUS

PDF

84.8 KB Created: 2021-09-01 11:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dafa9b540600ae581d1d71e259b525dc SHA-1: 308253a7b2d939b58d4650879e30f11eeb85cb13 SHA-256: c3a629d673b74319d66e70b41c8ca8b766cbd27cce33a710753f2a078e7dc1f2
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7386

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://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/c6da5def906a98f941eeef1b91a97982/15214603551.pdf In PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fe7f6e857---24312662040.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/3501200191.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/nupilosobixikizil.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/47052112086.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/c40ce3630881d0ca547178bc48f49ce6/10976733149.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/83108045515.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/7a0d1c1bd3113ec4eb4b9b4ca06c19bb/40517068528.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/pemelexabobije.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/985a27ae4cb97309a89c16d66d577dbd/sonevozot.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608769e037204---fekamajixofiganifek.pdfIn PDF document text
    • https://uniontend.com/userfiles/files/zojit.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/83567516758.pdfIn PDF document text
    • http://xn----8sbosgn1al9i.xn--p1ai/ckfinder/userfiles/files/mamarexadetironatu.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/sexududemu.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/80158386906.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/f7hmem2hu32lnci2avh0p80vui/zuvakimikesasedolus.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210527235957.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/c6d2e11dcd8e99b6e4794fd6e06f725d/63753573797.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6t5f2i5gujmtgf6ojsnhqkkvc7/tuvonifoz.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d525652f86---wunesot.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16083274120ce6---nugofidagez.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161104fb67becb---4469489331.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/solaretowujofurud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=freak+out+club+mixPDF 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_off00012027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12027 20328 bytes
SHA-256: 50c35d815692cd6645000e8d620070c250a58c779c38024ebb00596c6dc4376b

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