Malicious PDF — malware analysis report

Static analysis result for SHA-256 298a2b38cf423b85…

MALICIOUS

PDF

84.6 KB Created: 2021-07-02 04:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5cb3e16279ec34ab4d8a03831f541a56 SHA-1: 3f6eb7264ab24a59f6e04e8999e4f659ad171182 SHA-256: 298a2b38cf423b85f2683a0df666f8dd0cda8a28b62759cbdd74b3f6bfc4b6ca
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV, specifically as a phishing trojan. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a likely phishing or malware distribution scheme.

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 http://bioident.pl/photos_fck/file/pazonituk.pdf In PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/xikegixekugomajisek.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/d7efa3280e19334711d80880c7de43b2/98420277852.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16073fe12afe28---66162000520.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/c3cc591830f6d0649c34fec89fe53e18/98655359535.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160de2f6d2c117---90565017585.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad0552f8d3---divanonewonasupejikirid.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/fafetekela.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/el08jmv3ng6qv2dg1cjmfhruv6/32697567147.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/jifojo.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/e2453a03efc2ce36a16c7bac14eb833b/63482879433.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/motusip.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/91025196652.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210613_38A14C57266D0C8C.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/a31f14b066c22641e9566793d9dc946f/80577794969.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dbc35134c---8732463501.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16079b98514e34---jawitilufonifoselasuzebu.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/q1sttr8crot91ussu2qed3vc2e/rajogedabume.pdfIn PDF document text
    • https://securitydm.com/slicice/file/notitabajon.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/78639852459.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aab9c10b463---49536109235.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/7aad07b89289b6e51a807eb2d8a3b6fd/43687966591.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6fbb62842---10452652720.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/fufolipusoxibebiduvo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=cheat+jetpack+ps2PDF 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_off00011bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCC 10380 bytes
SHA-256: b9b58dca062520d93421702a9ce34cd60cad07fe41f5928f2958e21f12751f07
font_01_sfnt_off00013398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13398 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1