Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68cfe839c5c0244…

MALICIOUS

PDF

77.6 KB Created: 2021-08-14 16:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 91a1ff152e62e08d8d3d7b5a92f9be9c SHA-1: 36bb6109cc411ada6a3963ecea52faabda7d34a7 SHA-256: d68cfe839c5c0244f012ee7a94e74c50b591c93d6bcee51656b5e739cc8b8327
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to leverage SEO or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6553

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://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ac76eec71---45592100939.pdf In PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084e1b1e61de---15070842636.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/xezuloluropamadomef.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c25e29534---58607905982.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/40650418851.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/didapugazezofasi.pdfIn PDF document text
    • https://bbgpiti.com/userfiles/files/nojejevofu.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/81473635655.pdfIn PDF document text
    • http://keitbg.com/images/files/boluzaxepugetibajowape.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/i51jh7suqctlm78s507qu5q909/16184680794.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210726_9134A2AA97ED4A8F.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/dujipi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0fd1a951ae---55888908619.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b30a0a6c99c---91964296255.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/60402357049.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/ehib1il3n0mnh9b1devlgmsep3/tuderoxulenogalapem.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/15262822188.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/20550456198.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b7fc6ba04c---xoxikadepelananojuvolonil.pdfIn PDF document text
    • http://soc-in.com/data/media/files/tedoberipel.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091f614ba2e6---gugozusuvedexexove.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a0c1f8f2a1250b100882e8d750f9a7ed/9052551717.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/2081519803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=unredeemed+roblox+gift+card+codes+2019+unusedPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/16671306001.pdfIn PDF document text
    • 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_off0000f22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22C 11632 bytes
SHA-256: 5a263edcebb2857eeae0767654f9f28698a76f4d6f413975e53f9dd9f9f1bdc7
font_01_sfnt_off00010daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1