Malicious PDF — malware analysis report

Static analysis result for SHA-256 455ee16c7fd5e42f…

MALICIOUS

PDF

78.1 KB Created: 2021-04-29 07:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4b60c6977719d885b180a20ddf9d90f SHA-1: 144722d4ac6dc8d060e66f9abfa136926793dd6d SHA-256: 455ee16c7fd5e42f3774b3cf0a829262fcacde6e3988cb624663f71b14c691f8
96 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which is associated with a phishing lure related to 'informal education meaning in telugu'. Although no scripts were explicitly extracted, the PDF structure and the presence of multiple suspicious URLs suggest it is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076f3d317d0e---3103101832.pdf
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/763de14921d794894c49176a1765f079/56263646203.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/h2f3p3gg0f2rulbmfloso5a5so/wefoxibeluzilapetukebi.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/hacfc6pop3s6p5mgqu380h1kd1/dutogotavimikifumofim.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/vasamakugaz.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608242efafff4---juzesemefu.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071a1a402e8d---purifenilixeg.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/3d02b209433fe7fa70e1afa1df4f2ec7/1552808063.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/binoguduk.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e7be2f0b3---33575595286.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/79a405f7837edf820751414344f4f491/judebiveni.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/d87am2pfga8jtlrg719gmr3q7u/zugusivumaba.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606eaf9202803---85062023816.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/8f20c8f167a0243b6dfee6f326964d6e/46924268496.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=informal+education+meaning+in+telugu
    • 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_off0000d8be.bin
45ee500440d8ca2137e5c6f566e95f5771143ad5be3a85d1c3485cb02d05ebc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BE 5100 bytes
font_01_sfnt_off0000ea00.bin
258d24bbd7a26d584e717f4ea3f6e8daea54bdce1cf526e0885c184710d005d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA00 11668 bytes
font_02_sfnt_off00010834.bin
1207e9bbb28012d61053b831029ed60e7b1e24dc5e59fb6c92f60d101c1bf773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10834 10220 bytes

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