Malicious PDF — malware analysis report

Static analysis result for SHA-256 b323cb3c8e5e2767…

MALICIOUS

PDF

79.9 KB Created: 2020-11-11 19:22:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 82a585818fcca22a10b47f61bc184089 SHA-1: b8acb2dd578029ef948a8feffaf532cad9e8dac1 SHA-256: b323cb3c8e5e276713cf2fa5e43c885f05bc59642ec8f9df9396813c15455850
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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://traffset.ru/strik?utm_term=teorema+de+pitagoras+ejercicios+resueltos PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376374/normal_5f8a8fddd6495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418192/normal_5f980ebe2676d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/terraria_when_does_the_guide_respawn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab238db-961d-4480-a2b9-8d095a61fa4b/nunabejuxan.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/rapizitabaxujowasi.pdfIn PDF document text
    • https://s3.amazonaws.com/tagorarib/cts_exam_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/10093104426.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/41627994136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f96709-74a1-4c37-a0c4-b216460d341b/mimut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6acf9f5-76de-40df-ab17-ba58d30f51c8/44796534015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6aa432-908c-4c04-b160-02fd139d99e6/skam_france_season_3_episode_3_sub_espaol.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC4 5420 bytes
SHA-256: 97ea7d49e088826cdfd2b3d25940647dc2bd1bbb7b6dffe0ce7c0a39466abe43
font_01_sfnt_off0000ed17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED17 1752 bytes
SHA-256: 3ad990bdc0f1236c769d6122f2f8d1a8394ff751a50d59fe637f391cd6041389
font_02_sfnt_off0000f5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A4 11380 bytes
SHA-256: 5538a3300d2e4cf7e3cbebb719e63143770624339dacebbeee2013879b54456c
font_03_sfnt_off00011ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE9 16188 bytes
SHA-256: 4c684c6e4aa1598b9f25a7cf54871b12d628a12330f9d3b75f411227896bb8bc

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