Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee33bb3eb8a8c6d…

MALICIOUS

PDF

81.3 KB Created: 2021-06-28 04:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 09dca17f72b337741aa18ac9eb45dfe4 SHA-1: ecbce5fb04868687936dbf203b47c34116dade16 SHA-256: 5ee33bb3eb8a8c6d0293686e437ebe5473a38ae581cb747d2c0e1144f72b6f14
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and multiple links to external PDFs hosted on compromised websites, indicating a phishing or malware distribution attempt. The presence of a password protection lure suggests an effort to bypass security controls. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/b8351e023145bf6a205dad0cc2be3f61/verixenosulafowefopejet.pdf In PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/7ffa493a465ef9ca3427f42c4a77d2d0/xewakumetevuxazavako.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/potoxamit.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///47923572125.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/bc0614e8ce7faf8abff28692bf60ac9a/5287893351.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/motagi.pdfIn PDF document text
    • http://arlingtonhigh1960.com/clients/881088/File/56008812512.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/7cf7428f31ca51adfe375ec8be3d8977/59589938417.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/narenivenawugimivelagonik.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a92a177d63---taleda.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/0q4asv49u3ft7oc3fp0cgouq84/6756241693.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a97f90779a3---biketezebabedixujof.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f006043c5---nuputeraximop.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/murewekex.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/bsfijsmo2ddas2a04aq4q4kk2l/bavakevugoron.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/60920533799.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf52b91c8c---bafabaxisun.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/gexesuxoloxewibogo.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/541a1e6bac7a2352d0c172b531efd345/kenaduzudifixebuwopodexe.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/78927443704.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d0a78bbb2---serile.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/b465e47866453945d2700e54cc8b90a8/tesipox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+create+pdf+file+in+android+programmaticallyPDF 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_off0000d803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD803 10984 bytes
SHA-256: 2be345dfd1e126c664fc2266e841e393e5b816c6293fd549de72c58e1ed33352
font_01_sfnt_off0000f14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001095c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095C 17496 bytes
SHA-256: 4290ae5f9ed826e33d9aa3b41ff36df453f6e19a07fdb39dd7f6c6a8811d081c

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