Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b3f1d800a02982…

MALICIOUS

PDF

81.4 KB Created: 2021-02-23 07:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 413b94f599f06d355709847d7258d5c9 SHA-1: 953c695b25e4343ed11308d1fcebdbdf937f6ed9 SHA-256: 66b3f1d800a02982c7793935a90ba9470be24e813755f872b2f743529d97707c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when visited, leads to a phishing site. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Jean Piaget worksheet'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or credential harvesting.

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://maypoin.ru/wix?keyword=jean+piaget+worksheet
    • https://cdn-cms.f-static.net/uploads/4391602/normal_5fe78ab13997b.pdf
    • https://static.s123-cdn-static.com/uploads/4411926/normal_5fcdaadf5b8d4.pdf
    • https://static.s123-cdn-static.com/uploads/4368964/normal_5fdda244316fa.pdf
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/3d2ab08c494f87.pdf
    • https://static.s123-cdn-static.com/uploads/4416502/normal_5fcf4cd96e8a8.pdf
    • https://pipovako.weebly.com/uploads/1/3/5/3/135300091/9424473.pdf
    • https://cdn-cms.f-static.net/uploads/4421778/normal_60183e12ed2ca.pdf
    • http://tublitalia.space/626717490180ex1.pdf
    • https://seruborakumew.weebly.com/uploads/1/3/4/8/134849990/04a5bbc.pdf
    • http://finansi-7.online/64530319595w5t6u.pdf
    • http://rusakova.space/copes_acute_abdomenmov3w.pdf
    • https://lowonuve.weebly.com/uploads/1/3/4/5/134584544/kejonapos.pdf
    • http://alteramaks.world/tobagepukinezagirujfcpob.pdf
    • https://static.s123-cdn-static.com/uploads/4495999/normal_5fc7d264ba364.pdf
    • http://afracheat7.xyz/54637993922q86bh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vajefam/rise_of_nations_thrones_and_patriots_android.pdf
    • https://s3.amazonaws.com/wavunot/gepunijalovajopifupipuj.pdf
    • https://s3.amazonaws.com/wazotojemov/kursk_game_guide.pdf
    • 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_off0000ff0b.bin
c4bdd257008ee6d640ea9980f39b7e1917da4fd517208c6e73215ec197bfc04d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0B 5196 bytes
font_01_sfnt_off000110c9.bin
096513f7fc8a4db95d8f590705e1fc250847bc4072cad76b450faaff11055bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110C9 11632 bytes

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