Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec56173ffd9f3aaf…

MALICIOUS

PDF

87.9 KB Created: 2021-07-13 23:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 080257dd9634ed85fa4b8c1ca1649297 SHA-1: dba7bcf67f831461511e95dc4b2eba5b67f96b59 SHA-256: ec56173ffd9f3aaf71f798acc4ad3ac463cfb7ac6320c9a78f6deb7e4dba4b58
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan, indicating a phishing attempt. The PDF contains embedded URLs, one of which points to a resource map, suggesting a lure. The heuristic firings indicate the presence of external URIs and duplicate object bodies, common in malicious PDFs. The file's structure and detection signature suggest it is designed to exploit vulnerabilities or trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.1532

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/S-4CHg4Qmwo/square?utm_term=ark+survival+crystal+isles+resource+map
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec79cac8b0d544b6d6a41a/1626110410945/65277284301.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_off0000f36a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF36A 16792 bytes
font_01_sfnt_off00010b7c.bin
95dc92a207818113cf09743784d85f1c1cd04a6763dcc46defef87245280833c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7C 18052 bytes
font_02_sfnt_off00013b07.bin
c6876f40b284a698950e9d6c71f91e8691bea6f6ce7f1e255749754e48286e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B07 10784 bytes

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