Malicious PDF — malware analysis report

Static analysis result for SHA-256 1332a951e1d8d772…

MALICIOUS

PDF

69.6 KB Created: 2021-05-14 00:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31c07beb352bda1bb22e1ccb37e94668 SHA-1: 74beccc6d40dc8fcb61d6123d674cf97809db23b SHA-256: 1332a951e1d8d7724791fe701aacb6d9d1f4dc13efde548eb2dc881f2dbfd5b7
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. The embedded URLs point to other PDF files hosted on potentially compromised websites, suggesting a multi-stage attack. The document body, though heavily obfuscated, indicates it is presented as academic material to deceive the user.

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 https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8fddd68e0---jotukejuvedenukapujoj.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/46ff10033600bd37db18028c3853c3d8/riresepo.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16096c86897962---rabijupozabedevofemuzefud.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8265e07bb---lunolumawujafokidapupisam.pdf
    • http://aplus.to/userfiles/file/wuzupiwi.pdf
    • http://adabaskimerkezi.com/upload/file/60973334171.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc2c5be039---3211694213.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/4902ab985eb29b950e8a087d04d02d5f/jaxoleduvonemeg.pdf
    • https://unosms.us/userfiles/file/12195196582.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16086813ae00ee---6143233256.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079304655586---5458484152.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925c640c082---vumumabalekikadafefi.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/dq94e3ca6471u2p0p6sh29q0qo/8017112664.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c2f5238d1---56860772745.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec40d82729---tizovamoke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=microbiology+lab+exam+question+and+answers
    • 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_off0000cf26.bin
3d9d3b0adce13e9720c51f3bd246bd73c7ae0bf9e98809307d7f9d7177647d6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF26 5792 bytes
font_01_sfnt_off0000e2e2.bin
f8676d147f9e3e4798a836c12ebc93aa3dbc97e89d9d10ba6cee653b8e3c0b7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E2 10760 bytes

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