Malicious PDF — malware analysis report

Static analysis result for SHA-256 57dfda83634dbace…

MALICIOUS

PDF

76.5 KB Created: 2021-05-09 21:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01d0ae917821a8cdb49a8456e6ab67e6 SHA-1: 4c2fcafa180f5a16e6eaf150d5b9af91930b8e75 SHA-256: 57dfda83634dbace739d6cc5d21d26299a49d77eb02e7f9d77d05fb096c4c4ac
104 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high-confidence ML classifier flagged it as malicious. The presence of a URL pointing to a 'graphic organizer template ppt' suggests a lure to trick users into downloading a payload. ClamAV also identified it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://queure.ru/uplcv?utm_term=graphic+organizer+template+ppt
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091df7cce7cd---40550066264.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7fc0c4ffc---fowefavoxabepavu.pdf
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/5e4ecce864787b223a5fd32996af2b7a/65221689953.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/66c08a6b6a2ccd34fde970b264b3355d/favimubo.pdf
    • http://matstravel.ru/userfiles/file/xubunozasuweg.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bea7adef65---vevidikudemewenore.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082bf95dc547---75104621732.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5a532c0fa---laxowulexujugotozurirovep.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160877d38c0129---508240505.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/443bb5404f387ed6900784dd216b8ec9/19463059775.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/pmkmpoibdeiq2a5oo58o0sp12a/pomoderidavus.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/h6fl65v9pfutladqigq5groqp2/79405176322.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d4c6dc08b---95025584587.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22d.bin
4fcbdec554fdb87ed4f2c462bb6201f24f3c533e617966727983c96ab1788fe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 5036 bytes
font_01_sfnt_off0000f320.bin
df5b6341d39204eb0611ce639533201072ce4e38443625dc1182e6c6bb533891		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF320 10420 bytes
font_02_sfnt_off000116e6.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116E6 4324 bytes

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