Malicious PDF — malware analysis report

Static analysis result for SHA-256 a157718dc1b2c294…

MALICIOUS

PDF

72.2 KB Created: 2021-02-25 09:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf616f082507bf930f7b4b88f9a27110 SHA-1: e810a73b96c6ce4ae3e60bb30424a26e348e1756 SHA-256: a157718dc1b2c294881c82b6f0212ca7d3093a9cd06b45f4a9e1cf700a9ab69e
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains an embedded URI pointing to 'https://leonvi.ru/wix?keyword=caminos+de+yemaya+awoyo', which is likely a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious resource.

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/wix?keyword=caminos+de+yemaya+awoyo
    • https://cdn.sqhk.co/jagojixego/fXhfM6a/46672264467.pdf
    • https://cdn-cms.f-static.net/uploads/4393637/normal_601b426fd30a4.pdf
    • https://cdn.sqhk.co/sarafogu/j4jcidn/vezom.pdf
    • https://cdn-cms.f-static.net/uploads/4366362/normal_602ea3656b7b9.pdf
    • https://cdn-cms.f-static.net/uploads/4464874/normal_601783aea655d.pdf
    • https://static.s123-cdn-static.com/uploads/4495684/normal_5feb044e6b6d9.pdf
    • https://cdn.sqhk.co/zovaratigu/ioZi7gh/tank_stars_pc_game_download.pdf
    • https://static.s123-cdn-static.com/uploads/4449185/normal_5fc5a2b73ec12.pdf
    • https://cdn-cms.f-static.net/uploads/4463809/normal_603186f97bcdc.pdf
    • https://cdn.sqhk.co/sugezigo/hgKZgjT/pearson_teacher_assistant_practice_test.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lemefofutomapox/75644316641.pdf
    • https://s3.amazonaws.com/lovetijif/vuveje.pdf
    • https://s3.amazonaws.com/kovezux/73233398074.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_off0000dd5b.bin
cb0b311bb7d8410802b02af4ef14ee2077580fadaf4ba7d5d5f27cabb92173b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5B 4940 bytes
font_01_sfnt_off0000ee2a.bin
97179d447a19f30ee0ae5b989ce26d23e0c297445e67b032e6ff14a4379cd41c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 11196 bytes

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