Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2be85c1e8a84b2…

MALICIOUS

PDF

64.0 KB Created: 2021-09-15 12:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7fb2431af35bf537d2eb5316ede05ad3 SHA-1: 53e79fb680cacc7257d89a54299358f5041c62ef SHA-256: ce2be85c1e8a84b2eceabdcfd4308bc80ace36e931638f9439aeed4e9104b4d8
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score further support its malicious nature. No scripts were extracted, but the structure and URL patterns are strongly indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6848

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://decorstore.eu/upload/file/37372753157.pdf In PDF document text
    • https://www.thic.net/plugin/ce1/ckfinder/userfiles/files/73528490201.pdfIn PDF document text
    • https://pustelnik-budownictwo.pl/ckfinder/userfiles/files/vepuzifezuped.pdfIn PDF document text
    • http://fractinvest.com/uploads/file/xomunisimuzumiganoz.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/b38cf82a260046debefb7f01b628dc5d/67302112875.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/tapobobuwesofiviwil.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/suziriganiwovegoxepizan.pdfIn PDF document text
    • http://epicridesnepal.com/files/79051182487.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613a92185907e---balilutalasi.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/iogifl2q58gi7dse3pqsn1o8sq/7009757756.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c6f10562e---22107046184.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/32571110312.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/mekodozi.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/94551705503.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/bemibojojirufapagezokodav.pdfIn PDF document text
    • http://www.ap-arte.ro/fckupload/file/43347519663.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/lumoxipi.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/tigojiterojejinek.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae54b62a86---70089344529.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/93225367452.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/74949983530.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210902180937.pdfIn PDF document text
    • https://xn--psg-9lac.hu/files/files/43728288694.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/kusafimafifejuwel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=java+ide+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD044 18248 bytes
SHA-256: 34871a2d365bd1dfa43fdcab5fce5fe34647e0bcfdd2f3a5ef706ac9231b96ea

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