Malicious PDF — malware analysis report

Static analysis result for SHA-256 458d45d14cf3108c…

MALICIOUS

PDF

96.7 KB Created: 2021-09-05 18:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0b84485e41d20b0e923c3909c0ba053b SHA-1: 43eefc002f53809217c8fc999d60a3c9ae8f4505 SHA-256: 458d45d14cf3108c0a1b37512b0ea018674b41d2d5ca355f5ff74849bd09d04d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to link farms hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160867dbe9a226---75075578912.pdf In PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/pekuwidekuvewabeguga.pdfIn PDF document text
    • https://euinsuti.uniluxgym.ro/app/webroot/files/userfiles/files/rozufukebaxejesib.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/74976854455.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/48220862375.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/balatutezotoderovudad.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nukesl5tks2vh2u3bh5080p7j6/mubavimafufakegokas.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a531ce15c4---66906504290.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161174aba8f1cd---77915966551.pdfIn PDF document text
    • http://adveotec.com/img/file/78089939325.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf950a3abf0---95995365279.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/rezogomumemarumozax.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073c2da7ec34---24626867683.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160be6d4ea7f0a---79060510782.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f33f866be81---67187260313.pdfIn PDF document text
    • https://stvorki.ru/files/file/40896372433.pdfIn PDF document text
    • http://sobsai.com/ckfinder/userfiles/files/27307573836.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/68273252199.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/641b4f4c07a4491dbcc1e3caf61d3688/8856042121.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/kaletabelunirufunafiliji.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eed4a6e8aa0a9dbbbff267dc2a358a78/59478962797.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/28393904518.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/27734248676.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=surah+yusuf+full+pdf+in+arabicPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34F 23712 bytes
SHA-256: 424d2701ab7b59a62ba26d33c0a8a92c052641a4cd1454950889a87e5be6d478
font_01_sfnt_off00012de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE4 10796 bytes
SHA-256: 26b3c5e34ba6d1445d985486d5eed853543a873bb89cf925cc5f4565dcecadfe
font_02_sfnt_off00014663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14663 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E74 16360 bytes
SHA-256: 23bb95eeff04f534a3d23d5066ba6abb8e5e670d87dbd5b7bd9e07a2ece20ef0

Open this report in the interactive analyzer, or submit your own file for analysis.