Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b1131121f8e3d9…

MALICIOUS

PDF

165.9 KB Created: 2021-06-09 16:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7faebb0141213053b2ac5dde4d5a7566 SHA-1: 3043e24ece4fb3fb13be57de951887dea9ef535b SHA-256: 01b1131121f8e3d97c7c80928e2acd0d376b4aa821954ebcc1e7ce020a692c80
196 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://garglob.ru/uplcv?utm_term=powerflex+525+drive+manual PDF link annotation
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/kefs3voqjaqtroa0gdiamtsqj3/kebudigufu.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b221540ab9a---93498030213.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/ekixa.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9023031f2---46723506827.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/94934238280.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747c4844986---34869271448.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a458e105e---widaget.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ba05d77f76b---pavigotekunepoxamodefuvin.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/jutiwafapuzenagabuto.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2d2d16ada---pumikatapasamo.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/2a2185ae6fca8956d346215f44927017/22467709809.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/dofifapaliwumutebusixi.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ad79d21a0---folovunagobutusikemujewo.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/6g276its4n14coptsa14rdtgss/fenexokekop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21F7E 5152 bytes
SHA-256: 1f121301cbcb3a1fa473eb7aa0efc8236f6a1f83e1a971a609aa06e07c737c8f
font_01_sfnt_off00023108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23108 16040 bytes
SHA-256: d2ae33df7994d7d33826c7e406947077689ee9a723012beadc6f1353174e55df
font_02_sfnt_off00026601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26601 16324 bytes
SHA-256: d49484b6bd6687c28b83b0003929495d4accb145ecff815020f21bb1235df9c0
font_03_sfnt_off00027bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27BAB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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