Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b74a9a567b1c0b3…

MALICIOUS

PDF

67.3 KB Created: 2021-05-08 05:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11382acd015034893d48aaeb1abae12d SHA-1: 63bd88738d53a1e254eab647139763bbf90c05ee SHA-256: 4b74a9a567b1c0b37d4806b842e630421c63007ff171b3daf211845e655ec82e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs users to a URL associated with a worksheet answer key, likely a lure for phishing. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicates maliciousness. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://allytemp.ru/uplcv?utm_term=photosynthesis+and+respiration+worksheet+answer+key+pogil
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8264c709e---kajusiletezo.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078e585c0308---koxolu.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a20ca4a6a1---minetu.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e997bc287597707c5cf5f8a0b815194f/nuporiruxarulezoxu.pdf
    • http://a-kamen.com/userfiles/file/18935234306.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/askj8qv32jhni9jvp5bnl8c3ea/pomodutirulifa.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/otc8084ldtmeiu2cjt8i8g2n70/88203681945.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9cef4cc00---48043640974.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/p7h3hath96gljnc99njl7kinc2/71215753143.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078665ce3a07---wafaredipa.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856e10be8fa---norovobase.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836b255891a---loguxome.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9d0c9fcb9---lokufipufenodazowavagosel.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160889077db043---getovavizekotuvanivu.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_off0000c8c6.bin
cf57dba124aeac40e2b2474d85b08a6fa24f25869d05b33628808653e17c8bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C6 5480 bytes
font_01_sfnt_off0000db7d.bin
62c32771fe9eba0aa969e58ac6e4812777f742f524b371fc0c2956ba2c6e99c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7D 10176 bytes

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