Malicious PDF — malware analysis report

Static analysis result for SHA-256 de3a7b6c4733cd42…

MALICIOUS

PDF

268.8 KB Created: 2022-05-26 03:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 336b4293ebacac4dbb7ddb67f8361190 SHA-1: 3029ebdae4651dc8609625d866e272be7b19dcea SHA-256: de3a7b6c4733cd427bfd33b107f81935288684198f54b472b63a7e739d28d619
104 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a high-confidence ML classifier flagging it as malicious. ClamAV also detected it as Pdf.Phishing.Trojan. The presence of an external URI suggests a phishing attempt or a lure to download additional malicious content. The embedded JavaScript likely facilitates the malicious payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7347

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://ragaz.co.za/XSRYdR1H?utm_term=livro+de+contabilidade+analitica+pdf+descargar+pdf+em
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/434a7157f19a62cc9b57b9f9109fa872/pufom.pdf
    • http://dansecyr.ca/pdf/file/12750878702.pdf
    • https://bavifevip.weebly.com/uploads/1/3/6/0/136049805/5875012.pdf
    • http://jirout-truhlarstvi.cz/upload/files/72034773335.pdf
    • https://wojisixid.weebly.com/uploads/1/3/4/3/134359836/7693835.pdf
    • https://sixumogabe.weebly.com/uploads/1/4/1/3/141388156/bisun_lavuvuz_mururini_kifomivabi.pdf
    • https://rioclaro.com.co/kcfinder/upload/files/sugekire.pdf
    • https://jejenami.weebly.com/uploads/1/3/4/6/134684972/majurogomebidopevi.pdf
    • https://weritudasokapo.weebly.com/uploads/1/3/4/4/134494226/b77b434ff18e0f.pdf
    • http://hanarotalk.com/userfiles/file///14387393447.pdf
    • http://jorakaygame.com/ckfinder/userfiles/files/73530375431.pdf
    • https://ltssinternational.com/res/wysiwyg/file/pomuvaxifego.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/162386043bcc73---40140633345.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/54d8cd530a7f745312f9cd6af0ca946d/19056697814.pdf
    • https://wegodirudime.weebly.com/uploads/1/3/2/7/132740829/pakozozige.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1621e83cdda95d---11230207151.pdf
    • https://lugomovumejaran.weebly.com/uploads/1/4/1/2/141256975/38a3ba9f3bc73.pdf
    • http://redactron.com/userfiles/file/lesoxusenokajawew.pdf
    • https://kamabaxi.weebly.com/uploads/1/3/4/6/134650964/lowudimufazizi_puponafagivi.pdf
    • http://naylorrealty.com/userfiles/file/46437244250.pdf
    • http://eigo-manabo.com/app/webroot/js/kcfinder/upload/files/12233232939.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1624a96415db3d---vuxiwobuxufamofuvez.pdf
    • https://nofodomeki.weebly.com/uploads/1/3/1/8/131871852/d9c21081b8f.pdf
    • http://virtualcharityevents.com/vce_cake/files/files/zufujepinuwog.pdf
    • https://xewoxexe.weebly.com/uploads/1/3/4/3/134398473/ditiwimakedez.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003bb15.bin
da2594d97b9c58e0970b7cff226dab1f22f3483a5dce64df399da13042f277fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BB15 21764 bytes
font_01_sfnt_off0003efc3.bin
5e5b4e3af446fa8d271181bbcfdbacd2d8860a627c9de8b9c9efde2f29d59dc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3EFC3 11128 bytes
font_02_sfnt_off00040951.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40951 16792 bytes

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