Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f7c16df50214b5…

MALICIOUS

PDF

84.6 KB Created: 2021-07-31 11:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 181a00dd78a7576f6828eca36a189251 SHA-1: 3423dc621b1e5c1fdbf7261acc86fcda260a5f2d SHA-256: 10f7c16df50214b55b4e25f22e97951ff73a4173970c73e75106fd0247193cd8
154 Risk Score

Malware Insights

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

The PDF file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to obscure the final destination. The primary purpose appears to be redirecting users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6019

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://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b11d72801a---99631008230.pdf In PDF document text
    • https://rhuyscampingcar.fr/images/files/271979736.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/72130556709.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/a4d737d54599568b91fcb19c18d5f9c3/taxapevubamev.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/89036296011.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/ae57547d3345078b3f5f58b1eb9ad7d8/11689023402.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/12404679650.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/1691303118.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/9dc04f7ec546d6b37af48378f27d137d/loritanotozibedibaz.pdfIn PDF document text
    • https://bem-sa.com/img/file/govebosomejagideb.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/72c05ac03c674683bf0c4668d4912295/20173335340.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/kuxuraretadufu.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/3090973648.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///biwotawojefaxuzubav.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608408c536e0b---51632396740.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/9efa53f700953ee8de2fdf23d1845b11/40707043755.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/98595346488.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/4f5066f38ec37a3c2c82dc00cecc7361/87612332477.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/c5d85b9c6a35af2e68ffad9acf98edb8/jomutufuxewowomari.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/1tjj7t2ttocsndt0lnfi8vcsoa/risalasevu.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/c2kg7scr5mbqupdp5g7kkuo2q5/fejededitij.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607094c81902d---99391589996.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca8d19799e---xuluwanur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=amnesia+custom+stories+bestPDF 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_off000100e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E6 10564 bytes
SHA-256: 96f43df1cc54d6b6fdb469471450e7b37b0150d8aeede82c3c636e5b6a53b4d7
font_01_sfnt_off0001190c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1