Malicious PDF — malware analysis report

Static analysis result for SHA-256 9004e9c30fd5c7e0…

MALICIOUS

PDF

70.1 KB Created: 2021-05-13 03:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80fcba19c699df7ffc085dd047aae0e6 SHA-1: 24df171a1da2696e760d067b784a6daeab6ff9ca SHA-256: 9004e9c30fd5c7e057dc3a2bac256019e4c3f8d31838175184883059f95f6884
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that likely lead to the download of further malicious content, a common tactic for phishing campaigns. The document body, though heavily obfuscated, suggests a lure related to 'Apostila mecanica automotiva senai pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/a363d92f842f6d1647b2677af8ee154a/20077292829.pdf
    • http://anaminfo.com/attachfile/file/45706118896.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093670ad5e08---55776112779.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/aqhumehu3q0ionme18b8j04sc9/koravanezajalunakenewav.pdf
    • http://alliusie.com/userfiles/file/11812349900.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/r2nep9ddc5jbbgufvkclqm8k99/39054668020.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748c5a86e04---wajidorejozenumekidewap.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160873b847971b---36634922033.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d09b9cf38f---ziladuzigoberoluwa.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf15793aa4---lawenozuludibu.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608890d405961---vavijusatidiwera.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/04473fe3c09470bd00d63a933280567d/96764041254.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607689d0e3ac2---tofewubamoditutibe.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/penabukiki.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/tiqlpkepce7u97u91ot4fetjk1/25411494280.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/cj317lnhck7j6qb0omlh8kaam5/24695197224.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870134f3545---zapakipofenavor.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/0e778b34b0f0fd61cb1f6b93c163bd21/43919268406.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=apostila+mecanica+automotiva+senai+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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf13.bin
04a5b60df1ec5b66d8b6d7ebf13150f5d512e79d0fb11c05b0826393e17c8ff0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF13 5252 bytes
font_01_sfnt_off0000e0ec.bin
fa70be1df09fddb9f923e1949650a571c1bfc0d74ebdc2b6617af8af8888ca1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 13692 bytes

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