Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f4e12133ebcd9e…

MALICIOUS

PDF

74.1 KB Created: 2021-02-08 09:37:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 91e5dffb4767092dc51503ceef1e44f6 SHA-1: 27975dd69aac2cea0bcf9f58f7afc8be3a6f99ca SHA-256: c7f4e12133ebcd9e4445f86b63604a603946df0f0d9ef8e24749d6e37d3d38c9
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://leonvi.ru/aws?utm_term=czardas+violin+sheet+pdf PDF link annotation
    • https://cdn.sqhk.co/durotula/gjahjDn/22862867107.pdfIn PDF document text
    • http://vutazumadik.iblogger.org/bidabozamegijat.pdfIn PDF document text
    • http://gabonilud.22web.org/78308508924.pdfIn PDF document text
    • https://cdn.sqhk.co/tedatekalo/jhhd4rf/pinball_games_for_sale_edmonton.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wedutatitupaze.epizy.com/loxorikoluxalumowim.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/51335917908.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/incident_report_letter_in_hospital.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/diabetic_foot_amputation_guidelines.pdfIn PDF document text
    • http://didejanumaxunef.rf.gd/vpn_for_macbook_air_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/perfect_date_imdb_parents_guide.pdfIn PDF document text
    • http://tixinova.rf.gd/animal_jam_play_wild_windows.pdfIn PDF document text
    • http://lozadubevapoke.epizy.com/87401788310.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA69 5144 bytes
SHA-256: b05ba0e94dec7d018222cf35a1b6eea7eb3b2c40298d49e1af36489c4546e33a
font_01_sfnt_off0000dbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBED 11956 bytes
SHA-256: e5bce615637bd75abb40d4b85ce8f5e2baf05c9f951cd653df29dd8d9bf56f48
font_02_sfnt_off00010424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10424 16184 bytes
SHA-256: 99308d2943c7867383f38f1c211846cc6735cce0880ded375eef66ea4f3e2d8c