Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58aaea728e4eabd…

MALICIOUS

PDF

85.1 KB Created: 2021-07-13 16:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f574fd3bee2840f7ebd290939929f107 SHA-1: a21f218836e879151c9650ea8a3a565e82c67fe9 SHA-256: f58aaea728e4eabd98722a71cc437eb7b0c31db628f14cb740f30f6d3e9a3f48
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, some of which are flagged as benign, but the overall structure and detection suggest it's part of a phishing campaign. No scripts were extracted, but the PDF's nature implies it could be used to lure users to malicious sites or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6688

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://feedproxy.google.com/~r/sq/ugae/~3/EjZ5HCEZs_A/square?utm_term=anterior+to+posterior+tear+of+superior+glenoid+labrum
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec90e636ee212f66cf91cc/1626116326561/prayer_for_answers_from_god.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed8f05c439f8287166e9c0/1626181382009/tiny_cup_pepperoni.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec920f7d354a5e86a4181d/1626116624095/koxuxunigevoraxaw.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea41.bin
dd6ade95b863a2c786296cf2ffb297eb5469451e7c7a90fcb9a9ab182b276988		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA41 16608 bytes
font_01_sfnt_off00011508.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11508 16792 bytes
font_02_sfnt_off00012d1f.bin
bcff3af655a3b13df7e0e974ace8487b48df6f1ba2ee701f7c9b8cd8275e7ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1F 11060 bytes

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