Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d49e774f92c5c9c…

MALICIOUS

PDF

71.9 KB Created: 2021-09-07 18:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 825a532b116572f003b357b34a52e47d SHA-1: 697dd8f6279cd9c32da312027596ece1ab1737bc SHA-256: 3d49e774f92c5c9cddff29965519a38da214293aa340cc904e83aec84082d3aa
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or redirection scheme. The ClamAV detection and ML classifier further indicate malicious intent, likely to lure users to malicious sites for further exploitation or credential harvesting. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7793

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://copy2d.com/ftp/image/file/momovuzipasanuboz.pdf In PDF document text
    • https://digireg.dk/upload/3558381327.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608706c29359e---pidona.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/xawedisudinum.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/8515424548.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/af0817713f877d3db86f459ffac75961/wonezopexu.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e708695ea---32642038683.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/68211927394.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/81012151760.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/tumididijulelajed.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/27353366784.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/22968076100.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a187201e39b---70975222104.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610326761180e---defuvogupikiredafejenu.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/87618747674.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/tamut.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e248bb3f35---rolusanaguvif.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b28deab37---56063254816.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f34b1fa43725a2dd5f454d11f276e066/kexozogono.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ed5b5c1b7e---vemuxajofegevosu.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210702_C93C0819EABE403C.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611735586a4ae---96768417418.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=ao+smith+electric+hot+water+heater+manualPDF 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_off0000e3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 10660 bytes
SHA-256: eab799506d1c3787507fa61aa1ef5923eaa4ef4514e6f1e0f9f90280ec7e03da

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