Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73006feda921205…

MALICIOUS

PDF

93.6 KB Created: 2021-07-30 05:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 200bec596be8c65fb87b0c52365144f2 SHA-1: 0315c36f5b796b33505a09f110b4511361c205d9 SHA-256: a73006feda9212050e124d7217d55142c5caf672097573788ab76052c5975c0d
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d783e3187e---93887666201.pdf In PDF document text
    • http://montazerangroup.com/uploader/file/tolepuwopagovikebifeg.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/0bc93f62ec33502cd7b759d8880863e8/47628181168.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/8468a2b175b113dc1e35b7f7f736c439/56541888099.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075b56d25755---8771793991.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161001f1ade383---66485089455.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sawenep.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/57832012695.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/56811303142.pdfIn PDF document text
    • https://castel.ro/userfiles/file/6734308395.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c962b78a311---35431151356.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/ar7elpgqtcgg9fb4mv2m80bse5/89597568330.pdfIn PDF document text
    • http://camwater.org/media/files/fatepo.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/d40297e01d4d415b854132ec36e27732/gurodetubojoxinama.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/63158454167.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/56336641064.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160b380fdc2398---wutitaluxawud.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/xufufozijetutapoxovaj.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d4fe4019c26---pogujokebuxelen.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/daf7433df2e9dc3c02282fc820f91093/28228131733.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f50a0394f---39368821280.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/8a268097aa070bdfab2426059c394b0a/mexotinupiluzegexo.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/88955045580.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f31255d384532111aa2af138159e7314/27565366627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=ejemplo+de+informe+de+auditoria+externa+con+salvedadesPDF 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_off0001079f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 17752 bytes
SHA-256: 20245bbbc0fdd3fe7793d0129d29776662f774dafaab2386e26dd652436866fe
font_01_sfnt_off000134a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A7 11160 bytes
SHA-256: d350d0a6d663ebdcb36daad6c81b69566eab93eb419ef833c8a1932eaec630f4
font_02_sfnt_off00014eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1