Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb33f468384a3286…

MALICIOUS

PDF

84.3 KB Created: 2021-09-05 13:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: abc74cab1695dec69373acc31e726cc9 SHA-1: fc7ff76b3e94d470fe61e0ffdca439b1132add1e SHA-256: fb33f468384a3286009efec7d8ffeb7057b8e969621996e9a2ed1b7b624398ae
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or other potentially untrustworthy domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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
  • 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 https://www.pessin-location.fr/ckfinder/userfiles/files/17804941954.pdf In PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/cf08845ad66e9f6bd65532a4598d2302/3010995351.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/318e274aa464b3ef083d1aad67ca7829/mefixexegonenuvixekaletis.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e21b30cf376---74000846212.pdfIn PDF document text
    • http://vladekoservis.ru/files/85762726271.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/xopuref.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/84319779153.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/xowoxukiliruboliba.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/86f7e624193c7d0e88e4eaac26d35ed2/98257466787.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/noridotebefivuv.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/31571014856.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/mifanefekupagotaz.pdfIn PDF document text
    • https://stadion-nsk.ru/ckfinder/userfiles/files/32402272232.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60079388049.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16126afdda0d88---zolaxufodubutosen.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/sulafagikinozo.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/21636711970.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/8639bc027773cb711ecb215800b60a59/79385450528.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b0da1f7fa.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a385863c287---1128911264.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/rajotajezub.pdfIn PDF document text
    • https://regenerateacademy.com/file/73098017331.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=can%27t+edit+pdf+in+chromePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA40 10736 bytes
SHA-256: d38a679b78b67fb496424af49e6971b1cece40f740dd65ccc77f8b0ddcd5f0f5
font_02_sfnt_off000112be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BE 18764 bytes
SHA-256: 22049627746d86d8ed02acd21d34f318028903c9d244d83dca74daf5bc0fe0cc

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