Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6bec6194d14de6…

MALICIOUS

PDF

707.7 KB Created: 2021-06-12 12:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 36a5e84026c8a4ff6eb410139aaf45f1 SHA-1: 32840a77634eae50ee21c852ee0d1068ace498c8 SHA-256: 9a6bec6194d14de691a2f7a1874ae5a243704d61506b6faac65704b8dbe6dc82
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability or employs social engineering. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' strongly suggests the document instructs the user to copy and paste content into a command-line context, a common technique for executing malicious payloads. The numerous embedded URLs pointing to compromised WordPress sites further support the malicious intent, likely serving as a distribution point for further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7611

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • 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://huntic.ru/uplcv?utm_term=what+is+the+copyright+and+patents+act PDF link annotation
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/rurfub2cs32j4d9nchqba74a2j/13509989420.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085737dcdcb1---foxagurezupalikobiko.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/5f4e0a58d8cc9c5dafe87377436eccbd/gokukadasipagekaf.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/k692nbhsgh72gosp1lc9ktfjf1/45587472761.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//wowefibudaxokoluvijowibu.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c27b8a0482---rurogagowuboxin.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/2ea6772e772b62b651c0e8bce75ff583/66876031579.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/nuwaxajezo.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f20a171ed9---29424245145.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/c8ruvs0ghop1b8lgn1f7gve3d0/34325063641.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-4-30/20210430030205889875.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ed0aa7585---46203028625.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ua3e8isnl3ccjr1njfeps6jm84/dozuzizotigewafido.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/68882867961.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607361e5e63d1---tenekitapuzegetetejexusan.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32bc41ece---87572773450.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc248bdd9ed---dibuzudoridigubujexas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000ac420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC420 5416 bytes
SHA-256: 5e397f11237230b658a598b115ba9b66387905afa59213c2ee019191c814e078
font_01_sfnt_off000ad69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD69E 11396 bytes
SHA-256: 06322e543dcd9149b5dfa65fbff57803e6a0fa7504332651e03134d6f1da32e9