Malicious PDF — malware analysis report

Static analysis result for SHA-256 aceca8a50027fbd8…

MALICIOUS

PDF

80.4 KB Created: 2022-06-03 13:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 1005cda53c862561d1ef665470f470d0 SHA-1: 6f75e47067ec943710c1b574b4ed89469692883e SHA-256: aceca8a50027fbd8b32768687be37a5a818096457df037a03e3fcd8e180bf594
104 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and an external URI pointing to a suspicious domain, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URI likely serves as a lure to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://wirut.co.za/YmrXLWy8?keyword=understanding%20exposure%203rd%20edition%20solutions%20pdf%20online%20pdf PDF link annotation
    • http://radio6deenero.com/uploaded/files/65462908839.pdfIn PDF document text
    • http://senyemetal.com/data/upload/file/rowowukidelaxiwelo.pdfIn PDF document text
    • https://www.ibbfvhn.org/recursos/kcfinder/upload/files/14889043859.pdfIn PDF document text
    • https://zabokibijeg.weebly.com/uploads/1/3/5/3/135350751/831edba7c3.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/tajevumowizesebomojikaji.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/70404030246.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/80605213278.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/32552056880.pdfIn PDF document text
    • http://shesob.com/file/files/nipuvatawezitiwuxinonorod.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/gtfdirhkr5887t4tr076vqrboo/26666823273.pdfIn PDF document text
    • http://djpress.pl/Image/files/weravomu.pdfIn PDF document text
    • https://share.linkilike.com/libraries/kcfinder/upload/files/81206341704.pdfIn PDF document text
    • https://girosunemakafe.weebly.com/uploads/1/3/0/7/130739351/2847605.pdfIn PDF document text
    • http://bireyseldegisim.com/U_Media/files/japilapisedanofu.pdfIn PDF document text
    • https://furosujexamuz.weebly.com/uploads/1/4/1/5/141514314/99998.pdfIn PDF document text
    • https://montferri.com/admin/js/plugins/kcfinder/upload/files/narajamulavabemuzeziga.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/xolafavijewa.pdfIn PDF document text
    • http://elektro-galerie-hamburg.de/userfiles/file/gobegikibelerakej.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16299a693d3b57---90025930841.pdfIn 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://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_off0000cd24.bin
ac16c36edcd2abacfc6e36f61ef9feb3270d2890db20f9d6476896459e49d624		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD24 11052 bytes
font_01_sfnt_off0000e6cc.bin
1ce27fe7dd225ed6d75daf3e780832996e8152b69630749b8ff41e26749a8fa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CC 20080 bytes
font_02_sfnt_off00011b56.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B56 16792 bytes

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