Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c4f9d47caa3ee1…

MALICIOUS

PDF

131.8 KB Created: 2021-09-16 09:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e598c9e2d24040ca9a668292061594ef SHA-1: 88f02a7c3483cae0e3a60c7f03255c336c9f2d86 SHA-256: 15c4f9d47caa3ee178161eac19e96cc9b2084bec6cf07b3809060a92891bddb1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. One URL, 'https://pixomot.ru/uplcv?utm_term=street+fighter+2+java', suggests a lure related to gaming or popular culture to entice clicks. The presence of a link farm and compromised hosting indicates an attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3051

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://pixomot.ru/uplcv?utm_term=street+fighter+2+java PDF link annotation
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d029c7eb7---pogakax.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/11351202440.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/getasatemasuniwela.pdfIn PDF document text
    • http://bamor.org/userfiles/file/8116380361.pdfIn PDF document text
    • https://mmrh.myagenda.cz/pictures/editor/files/62489070902.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/raxer.pdfIn PDF document text
    • https://regenerateacademy.com/file/keriguxexuxezerewivupa.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/37738755914.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/6416578460.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/40924996294.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/pivefanalareguzuwev.pdfIn PDF document text
    • http://ledlight-lamp.com/mingyi/images/userfiles/file/matexajem.pdfIn PDF document text
    • http://firegallery.ru/img/upload/bosofaporubotiwelaxifupem.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/15324030249.pdfIn PDF document text
    • http://okcashbagusa.com/uploads/files/kerubogafumex.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/bijakumojuduxugixufiduk.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/93403356632.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/cac9c2fa4a46f8d9363c63350c7cbe98/87025145075.pdfIn PDF document text
    • https://people11people.com/uploads/File/sodirik.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/bulowajuwopidixizumapod.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/3858290352.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/161411445a3129---tedaruj.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/birazuporovipajunus.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/51947350351.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ab2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB2C 25880 bytes
SHA-256: ea86d8fe4507c0a77fd7ac9492a076bdeaedbecaa97b2d157a51c5d402b23197
font_01_sfnt_off0001ed4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED4B 16180 bytes
SHA-256: c0217721a1102ad1f8a8ff5461faadb02f26a3634bfe128d67f68b25b112ee8f
font_02_sfnt_off000202eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x202EB 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc

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