Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2ed57db2fb9971…

MALICIOUS

PDF

87.5 KB Created: 2021-06-28 05:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 26c7168cf50896ef26470f0216c89e6b SHA-1: 915a4408497771e7792724aefa9ea15a41b8731f SHA-256: eb2ed57db2fb9971aa55e3f26f16cc84daf45dc9ba0b895e663801ce7e1f0a04
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload storage, suggesting a link farm designed to distribute malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution attempt. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ivanamihic.com//files/41239236733.pdf In PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160857b89b9ef0---1567718370.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160823d3964786---37587746154.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/begumunuretewoziki.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/2e4cd5125ac7866f07630845f02c800d/tevavepeki.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa3dc5fd3d---5079053299.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/0d566ca8c3ff989b61144b8d530bd9f6/76723114738.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/d1742e88c7ff62ca9e2e6c6f584f1b21/mawabuvekotux.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b0faaaf6d---durerexewib.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/muwipulapatixanebo.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/zarubewapitusi.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/s180tevbikd5bbi70lc9skvdb6/mozuwogoxajivoxetosamuwam.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/duzapugin.pdfIn PDF document text
    • http://akssert.com/userfiles/files/kamoseneb.pdfIn PDF document text
    • http://land89.com/ckupload/files/jalunugamomezadupuvixib.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db5398cfa8---24876456889.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/ej35kvrk5bpdcd8vqhnule97vt/xivalekukapo.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16095b0a74656a---2401563075.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c855ecc288a---bejetibop.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/cfcd7e274d030571768b31187788f34e/dulefakujisaxugesizifop.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/fezuli.pdfIn PDF document text
    • https://capecoralliving.com/media/file/88522889324.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+last+airbender+full+movie+free+download+in+englishPDF 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_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 16748 bytes
SHA-256: 9a89a6a2beff283d5c53927ef61aaaf796ff4f90d57757e79a2f34599c259e07
font_01_sfnt_off00011e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001368d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368D 11156 bytes
SHA-256: 786761e5abc4149f753fc43e5658e5cea9c1311636ce7ddaa0dbc208baf9b133