Malicious PDF — malware analysis report

Static analysis result for SHA-256 9488d195fb71b7f2…

MALICIOUS

PDF

88.1 KB Created: 2021-07-07 06:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 62f880dba23080ee677e4eada013e287 SHA-1: 63e959f6398e1546ec9a328e5a85cae3a59e0108 SHA-256: 9488d195fb71b7f216e65533c87f14cdeb4a5f38c4aa5c29da07c3a1a08b8801
196 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as malicious and by an ML classifier. The document contains a lure to execute commands via the clipboard, instructing the user to paste content into a shell. This is a common technique to download and execute secondary payloads from compromised websites, as indicated by the numerous URLs pointing to potentially compromised CMS uploads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/sbicq9gvethh0l4ohuiv510rpj/pesidafofewi.pdf In PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/1e0bf722b68d04ed7aca6dc3ae54d886/sinapajinofesarufup.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/73849743655.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b907d760950---36509543805.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/137b39dc83d698dc742b28db53754dd5/gazejusibamiwimefep.pdfIn PDF document text
    • https://plasy.com/uploads/file/katug.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/27327229587.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/k8r82g4f8171n52mbmuc74e699/nunadobamuwuruvegi.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbf514db6df---liwilideper.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bed694c4005---21863958369.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/fodotoguzotofawemunodago.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/65f1383a94fd41eba92dca4f7b4412eb/24219788139.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb810bdf7f---39631833937.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/fenal.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/jomezakitosidipiwadi.pdfIn PDF document text
    • http://wearebryants.com/clients/3/3b/3bb22ab34fb8fe691aabc4d0498f9caa/File/jonomizak.pdfIn PDF document text
    • https://avvocatoboretti.it/file/40621724789.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/855c60ebcefc16d4c9749afae6e7a5b7/91049313553.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607129a5637fb---dibip.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e7010f1f6---95323744611.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd06e6955a86f788860e8c8a553e990b/vefesuzareremo.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/45821352910.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/16825768113.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/15477272928.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c85766b335d---50815988442.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160b404c795ded---gurazufigetozomopo.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/f40sfbaoikmquqtj2omhtsapqb/20408782028.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b260da72013---73061241278.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+cut+and+paste+pages+in+pdfPDF 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_off0000f3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EA 17472 bytes
SHA-256: 5155fba9910c1e6aeedfa618d4876425deaed825d03b2a26c4d8b7d97cb3ca3b
font_01_sfnt_off00012196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12196 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AD 10824 bytes
SHA-256: 8b99171777d94754e74077ad10e2c4f9008a03a3df390ad548650c268cb8589e

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