Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6156afc78924aee…

MALICIOUS

PDF

87.0 KB Created: 2021-07-14 09:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 9927b27920d7fe553abcbad966258617 SHA-1: 92f8917c57b0019bec8059fa3828dd355b92fcb1 SHA-256: d6156afc78924aeeebcda9babbc261311ee365c759cef91c408017fceb622930
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3632

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 https://master.plus/wp-content/plugins/super-forms/uploads/php/files/c4bb510aadf0a1c2f012b04727a21572/12227236351.pdf In PDF document text
    • https://eqonetech.com/upload/userfiles/files/38570088048.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/jowigomowosepu.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/cijprr30le87mjemcsqk8hsmsn/29660016348.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4b1b57759---11639799663.pdfIn PDF document text
    • http://intergeored.com/upload/File/xedenaparosalejawuxifik.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/431e8418b12ba2d2606bd796839ab8f4/76489901486.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7848886532---57090043906.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/97612858164.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b2977c65d31---25396181748.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/tejomupil.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/14516207157.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e664ecffe---kuvaze.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/gawusirufeguvipotonaw.pdfIn PDF document text
    • https://vestol.bg/files/file/zidijonawewefigilifopetum.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/mitofakidonezelulasuvo.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ca5rvtrfbgeagrn48mvhskpnrh/ferunojavititisurejemawa.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/majuzudusugokupurufuk.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097a521b2363---19959994314.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/r1d5239i2ll6ra1mfr5uhnbotn/lutaloguxevi.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/34230114149.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/zawigamabiluretakebomibu.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0bf5573dd---94142699970.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/51530759327.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf2e7acd09---dower.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=have+a+good+day+in+creolePDF 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_off00010a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A98 10448 bytes
SHA-256: 9a294cb770654023f780b50d3a83ab1293874033626756c5ed5eefdd909ebb1f
font_01_sfnt_off0001221b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221B 16776 bytes
SHA-256: 2d9901f7a7123b9feeb87c5f991c6dc882084dd0c5562621dd3d6323365c934a