Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2887466e7d1ba57…

MALICIOUS

PDF

106.8 KB Created: 2021-09-05 14:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8458ebb5cb5547531db0e577c9260d70 SHA-1: 50f8438f44da3b882f0411d6ff2a1e4c5378e89b SHA-256: f2887466e7d1ba574aee6d762d90f8ce9d40295c2bdd1509fab88f822f448671
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a phishing or malicious redirection scheme. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and link farms indicates an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5045

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://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/46430867998.pdf In PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/26628047035.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de3d9335a8---gemejis.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/503407f079d741d17b070f679fdaf129/nobesof.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/36940756752.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f0f69bc95---66114253665.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/36265623089.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/90261070673.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/8b7c222675d079833bdef2ad8aca444c/99439335700.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/77546523533.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/36916769691.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/26307897972.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c2222838215---gelumazafadigola.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/nazizadoberotozovaxaf.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202172784375474.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/60f2bf35f8b4dc07973eb9709a6c0008/zozamilitugegapunaromi.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/98772905543.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/sanowelibeladusin.pdfIn PDF document text
    • http://pneusmarene.it/images/file/68874901467.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/90872659156.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/tigenovobet.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/papaxudojujevuworekuju.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/46919995964.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=john+austin+jurisprudence+pdfPDF 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_off00015d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D71 10892 bytes
SHA-256: 1c9677031a9525711115cd8d02522f96a9d0b3fae9f54b18dba869511d1820fc
font_01_sfnt_off00017694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17694 20692 bytes
SHA-256: 2a63418c8bc07303d6afbb29c980e07612763935d4e6fb9e4ad03ba6365f903c

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