Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb3d0246786c29d…

MALICIOUS

PDF

76.0 KB Created: 2021-09-07 16:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 89de4872d83bd839ba13bb6c7de90bb5 SHA-1: ab68c00004b6c372e9ac2dc3575fbe7bb2943904 SHA-256: fdb3d0246786c29dd1ebce980b6b3ecdc8e238ea8ba0f2bf1b39c7ce5edd024e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://wastran.ru/uplcv?utm_term=plotting+reciprocal+graphs+worksheet PDF link annotation
    • https://aljuboori.com/userfiles/files/97568494314.pdfIn PDF document text
    • http://lycee-elm.info/userfiles/file/4431526889.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f10945fc4b---25191945012.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f530350e10d---mofenaxuxowaful.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612169697f5b7---pinege.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c35b07bf639f4f196c92da8e4ac32b89/wivoxoji.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/78681665285.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/ritotuxokuwewiw.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/5631f2f57997c484a3602449505cf8b5/kapawemopi.pdfIn PDF document text
    • http://dlzj.net/upload/files/2021061003514198548.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/258f4ca246e17b50df20f8f39aa4645c/wumadibexutojoj.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/26415736045.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086cc94ef6a6---80829303470.pdfIn PDF document text
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/25676218002.pdfIn PDF document text
    • http://klientskazona.radeton.sk/ckfinder/userfiles/files/55214046669.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f2419b296---43003304327.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/lufabekutapivebeseweruwij.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/5482146537.pdfIn PDF document text
    • http://www.rajpuc.pl/pics/file/nifobunoje.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/8141vj0i3pp97ob7pg86hecp0b/79755188591.pdfIn PDF document text
    • http://greenbrier101.com/userimages/28921102380.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/70d1701e539da46ccfad37446e9ce481/dinolubusa.pdfIn PDF document text
    • 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_off0000c3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FC 10832 bytes
SHA-256: 08b5fb623355a2129f4f5e28ff65f9bcfaff6649fbf4b253ebf1e9f025c8dcc5
font_01_sfnt_off0000dd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD00 17436 bytes
SHA-256: 597aacf15588843288bb26a9b6ca2fa19717b15603544602dd6e5d2ae04148c1
font_02_sfnt_off00010a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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