Malicious PDF — malware analysis report

Static analysis result for SHA-256 827b90fd010c7d45…

MALICIOUS

PDF

74.2 KB Created: 2021-07-21 06:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3f3a827babdb540e5a1b7a4da25564d SHA-1: 915d1e53bfa684d56b86f70cec1ac67a4fd4527f SHA-256: 827b90fd010c7d45a7124d764795f6af61a0441d5da87f57e5168cb9cc0e16f1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded URL, disguised as a search result for 'snooker 8 ball pool free download', likely serves as a lure to trick users into downloading a secondary payload. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user curiosity for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8028

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/gOBB6uaVNRA/square?utm_term=snooker+8+ball+pool+free+download
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f71dbeec415f7e29bf24f4/1626807742761/optimus_prime_printable_coloring_pages.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed7a33bde79631d33fe526/1626176051825/tefave.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e83f64f0b0395a876f0495/1625833316230/lefinagatobusuviluvi.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_off0000c2f7.bin
b07ef7255a573988d0f478b40ad9433cb46897054c8d958e18224cb1da2ad7be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F7 16116 bytes
font_01_sfnt_off0000eca4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECA4 16792 bytes
font_02_sfnt_off000104bb.bin
7704b6ce30f3b7baf335c67ea68efc5a8d3febeaf398cde28d65421e7abac7c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 10736 bytes

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