Malicious PDF — malware analysis report

Static analysis result for SHA-256 3433db87f7e5c559…

MALICIOUS

PDF

73.4 KB Created: 2021-09-08 07:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a666f002fc154aee8a4c0e9f35fa0fe6 SHA-1: 290fa50b7d90caa50d3c239728634e97689a64f6 SHA-256: 3433db87f7e5c5593d694bb94570f489b41cc7c9d07d64e96f4572589dc7ed5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://pierrevillers.fr/mairie_files/file/3136740698.pdf In PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210715_928B929EDE5119F6.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/pdp4mne6r1l8u9n3vjovrkd045/53372200440.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/20218291158299605.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087134fe93e5---budivalirog.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/6c1cc88466c9bc0bc7bbc2fff166d9e8/rajiv.pdfIn PDF document text
    • http://liyangah.com/Upload/file/16153133807.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-06-23-05-05-30-JkTzbjVF.pdfIn PDF document text
    • https://semot.com/Store/userfiles/file/74571272639.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/raxelibedixowizikut.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/64775431821.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/32607139950.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c41728d9f---85015486764.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/vinozunomemumofezuvu.pdfIn PDF document text
    • https://micsys.in/userfiles/file/77067487662.pdfIn PDF document text
    • http://cycling-software.com/files/file/nilabedumovipusefejakavar.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/1ulpaikqsndhcmm50m80mafsm5/mubokab.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dce19a766---24242819375.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/kakatibojorogekizaf.pdfIn PDF document text
    • http://chapelguild.com/images/usr/xogetino.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/vugatu.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5565e5df79---21880261613.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/br9s7drleembb32dgsagoktei3/xosope.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160959bec55128---turozox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=sketchup+tutorial+pdf+2015PDF 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_off0000ba7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD293 11140 bytes
SHA-256: bc8c06e7b36050e3fe6f9e67f48c7a97260dabcb5ab4206aaac85141a6315578
font_02_sfnt_off0000ecd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD2 16856 bytes
SHA-256: 8febcfd8299332e4838dfaae770b7ca7c34ed824a6c60e6acc6e31fe994891b1

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