Malicious PDF — malware analysis report

Static analysis result for SHA-256 8efa9dc35eba2583…

MALICIOUS

PDF

205.0 KB Created: 2022-05-29 12:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: ebb0ef1bb441719451258345ed5da8f0 SHA-1: 500a6e043042797e64bc007e1e13e0c181990c30 SHA-256: 8efa9dc35eba25832933d3db19e8ce2b38a3c6cc699a33132e993853317a45a9
104 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript and external URIs, with one URI pointing to a suspicious domain. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded JS and external links suggests an attempt to redirect the user to a malicious site, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7752

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://colod.co.za/YmrXLWy8?keyword=suffix%20tion%20worksheets%202nd%20grade%20math%20worksheets%20printable
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/162894674c34ab---84639609543.pdf
    • https://kenuvibugitevam.weebly.com/uploads/1/3/4/7/134700053/nolanajukaxedutudun.pdf
    • https://xuvidomukak.weebly.com/uploads/1/3/7/5/137503681/16553.pdf
    • https://winuvuvivadasuj.weebly.com/uploads/1/3/4/4/134480566/xulexape-janetizijemuv-wonigaja.pdf
    • https://zokibiruxe.weebly.com/uploads/1/3/5/3/135326092/jometevivimob.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/162661e15d1a6d---bemegidujejamevol.pdf
    • https://fufagefi.weebly.com/uploads/1/3/4/6/134638184/duwamaseti.pdf
    • https://roshnaai.com/ckfinder/userfiles/files/96738771695.pdf
    • https://soechi.id/userfiles/file/93563898038.pdf
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/munimogugiwafol-mezega.pdf
    • http://hzzxtl.com/UploadFile/file/20220331150325943.pdf
    • https://miseridobipik.weebly.com/uploads/1/4/1/4/141432477/faxepedajavoruk.pdf
    • https://zezuwosizu.weebly.com/uploads/1/3/4/4/134459619/5354826.pdf
    • https://www.escolamacrobiotica.pt/backoffice/assets/js/kcfinder/upload/files/morozukewofenarudukeduk.pdf
    • http://saovietgroup.com/upload/FCK/file/xitetifijix.pdf
    • http://svazekobciorlice.cz/userfiles/file/64762361687.pdf
    • https://tijozamuworibop.weebly.com/uploads/1/3/1/6/131607374/2f11511c4.pdf
    • http://lagunarent.lt/ckfinder/userfiles/files/lepow.pdf
    • https://fefaxositepimu.weebly.com/uploads/1/3/3/9/133986539/139083.pdf
    • https://themarketlook.com/assets/ckfinder/core/connector/php/uploads/files/ropipalonenubivagavipedaf.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1623ca646c80ee---rizozokatatogofukafiwufez.pdf
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/medidewisizufakenogewikum.pdf
    • https://jutisopi.weebly.com/uploads/1/3/4/7/134775863/wivefub.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002a9aa.bin
86cfd7326d87071ec89f4ec40aca2a20733bcfe24d063e479a22e455b5252949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A9AA 25456 bytes
font_01_sfnt_off0002e53a.bin
2a64895a19891a154b52a27bb4a5d6973904af50bd453bf412baf54508ff86a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E53A 11660 bytes
font_02_sfnt_off00030079.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30079 16792 bytes
font_03_sfnt_off00031886.bin
6b2f43824ad5fa079027f6124f3a4ec13044ba9b23b509f2df3d09a54c1bd94f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31886 1988 bytes

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