Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d59365e954bf481…

MALICIOUS

PDF

95.6 KB Created: 2021-09-01 14:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 43919fdc6e812610e8096ce76b4d623f SHA-1: f41f4c8e691215df0cc6bdfff93e5cabc4e20937 SHA-256: 3d59365e954bf481e46cd5750b61edcd94d6aee139b582faf53f33742ddc0d38
124 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external URLs, some hosted on compromised WordPress uploads. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or malware delivery. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user lures.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4108

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://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bexazotekutujev.pdf In PDF document text
    • https://didacostruzioni.it/userfiles/file/17463383571.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc0847a17d---92695138565.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612b8f927e3c0---tebef.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/tanagowanumamubesa.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b256977e0---liwade.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/39217268877.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/8e8357cbf8a3d4743ca7c776e7fd5229/nupove.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607231b62ff4c---53882732176.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d243fa21ba2---9294580490.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/kuponovizomatiruz.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/e0902a91ead2e3c2afcd2e89d8317eed/dugupetugisituwob.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/tekawutirekafiv.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083940460ee4---dekagetugona.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/81308065929.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608133fba8780---43352507966.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/pudimuzixefisi.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/9623a92394f5de056c276fcdff1e250b/19866979398.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/28050613526.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16085d609595c7---34165729426.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/pemeladek.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/31174933705.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/32615804704.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/zigimigopirosopedakume.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ulnar+styloid+process+sticking+outPDF 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_off00013a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000152b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152B3 11000 bytes
SHA-256: dc23662647984b460b0da7213cc0138112c962b42b92fdeb834e25cec788bad5