Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e734233f0ca3842…

MALICIOUS

PDF

87.3 KB Created: 2021-08-29 12:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9d24fb93a3353d8516316536e2ff6043 SHA-1: 637054ce8b9e178c9b22614d08a9c86816bfcf9b SHA-256: 6e734233f0ca3842bd35192d757a23717e76e9dad18a62f45a2feace976989fd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier as malicious and by ClamAV as a phishing trojan. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to copy and paste commands into a shell, a common technique for executing downloaded payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160beea998e810---ranitetizatabo.pdf In PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/5c15e4efb133957cf48d509658f09857/venumivumefom.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/lunel.pdfIn PDF document text
    • http://drive4smilesquebec.ca/clients/f/f5/f58105ca183540932673f5bf18e62671/File/59972438357.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/0efaec46f2f30565d5bf2fbaea299d5e/kasezubedelujomugozel.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/43704897381.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/17349274826.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/199945340fbf59c56cdb7d2e474ea6a2/jemepoli.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b17bd3b17---8674772011.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/49609dc96c86f917f0ea1734e434157f/36214606411.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/47691109350.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160822be74f299---damidugufexevobalizujerir.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/titajijorapudagevavegebum.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///24094764347.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/javudem.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/0c3qduv72bu5vpo1o0ha5tmr10/63546581281.pdfIn PDF document text
    • http://juentai.com/userfiles/files/40459258653.pdfIn PDF document text
    • https://aneri12.cz/res/file/11299172613.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/8828c88bbe54a42388e8f5247815cfb2/kesumalonatefik.pdfIn PDF document text
    • http://chongros.com/userData/board/file/kajoromosadutugamupefap.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/40616228104.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/f7cf3utgdf9spoaso87mdb1v0s/74002492643.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=mac+os+iso+to+usb+bootable+softwarePDF 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_off0000ef86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF86 10544 bytes
SHA-256: 7a7d160d0071811d2ce8cf851e98dccc8043109dcfc592989d88a7c8eec2c89f
font_01_sfnt_off000107d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE2 17320 bytes
SHA-256: b375251b246342c1fdd6e0cd4ca710e3db4c9e223ad327cf4ace1106bd79ea45

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