Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f24dea6351ebcbd…

MALICIOUS

PDF

76.8 KB Created: 2021-05-16 10:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e66c5b68f4e700399c48c6b2ecd731e4 SHA-1: 572b69675bd05e3e1202988c072fee63021c08e7 SHA-256: 1f24dea6351ebcbd11be1f6e3ff0dc90a8229e73b131682b09adc77f91ae6097
116 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, one of which is a raw IP address, suggesting an attempt to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URIs and the high confidence detection scores point towards a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://krisoc.ru/uplcv?utm_term=android+watch+sleep+tracking
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5a625b29a---retexokobiwuduraj.pdf
    • http://adabaskimerkezi.com/upload/file/85390891011.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/tunva06588oqpd3dvv607hau9g/61420495972.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a8fc53f41---57899273859.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9556a8300---99991350452.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/3li7dp747n00kbl8k24djo8a8k/30117108153.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/685da79eef9fee7e5db7d03b1df2e029/26706420630.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607443f865b0f---noreno.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/tlespvg9op5p86npf7d6mv0bp3/15244344977.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/a34e67a5db08233806174a9ca3b61b0a/fetasekigid.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/fdca94710a2c9162238bd16b87b6609d/95944056160.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce5c2e2fa7---17030492013.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f72113b2b9---xagopupiwiw.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/pukubejinugufogidirapub.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a14778ba35---rifudabizitarijuki.pdf
    • http://157.230.241.115/image/upload/File/89856588546.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec79.bin
edaad6aa23c7c3c79b31f760ce564cab1fb3750a39d92c9b53309ae2fcb99426		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 5480 bytes
font_01_sfnt_off0000ff2c.bin
22ecbec8c8f9af7bb323f68bca58dce3f8d88a2166599833303c08c4bab07433		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 11100 bytes

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