Malicious PDF — malware analysis report

Static analysis result for SHA-256 49601e50ae32d0b3…

MALICIOUS

PDF

85.4 KB Created: 2021-07-05 16:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e6c30ca6f6e21bd1b7d6712615bde6c SHA-1: af5cbec8cee6475ddfb68d5473184ca68ce9f7e8 SHA-256: 49601e50ae32d0b35ca36cf8788db425b35405a760cda7a9395426161666e6fc
196 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a shell, a common technique to bypass initial security controls and execute further malicious code. Numerous URLs are present, many pointing to compromised CMS uploads, suggesting a distribution mechanism for secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/2psvkceqra4jn6o330bgototu0/jamamobaxulonasojewaruram.pdf
    • https://amd-export.com/site/upload/file/70155001337.pdf
    • http://beateromer.com/bilder/file/40443133033.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/854ec4229da0da75ad2093b560146f46/60909286916.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a0cdf15d9---65006346198.pdf
    • http://adaviestransportltd.com/userfiles/file/wopoxemewad.pdf
    • http://parvazyab.net/basefile/api203/files/mosazorodunoge.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e33c4b61eb---zamanegegofiresugulefagov.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868d54c10e8---66326883798.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a779d2ed1e0---35730214159.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2bdc5e916---wuninugajatuxugi.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/90f5d1213902785a3f23d6963e847522/nirenudevivuxowije.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f159a2dda---34166310952.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1518f5e064368efd276aca3327b60b12/55987684553.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16088a7283503d---15791168860.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608366c5e79f0---gekuxokiwugab.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/22c0220655e392d8b5632064a5b98be9/dinafewawolumivenigix.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160baad7db5d14---28300956163.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/e298d92c33c911dfc311e05c064b37bf/wuwubezixofebij.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/2299a9dd8da1f6cc49df931ccbee7b13/bidojirinazirobeloderew.pdf
    • http://amidoux-peintures.com/ckfinder/userfiles/files/zomavutus.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=best+free+pdf+editor+for+linux
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edbc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 16792 bytes
font_01_sfnt_off000105d3.bin
32dc001fdf44298146480fc3bb13a952ddb86391f5e119ac7452d2d23423e37b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105D3 10584 bytes
font_02_sfnt_off00011e15.bin
565a6dfb34b3315c4d4dff44f47e9421283fc35f4d4cfc09246a8bda77985faa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E15 16296 bytes

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