Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee815d24435edc8…

MALICIOUS

PDF

77.8 KB Created: 2021-07-16 02:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5477511405a2707634206267f134996a SHA-1: 8e66cd1786ae581b09c89a7517ec03e9765c9232 SHA-256: 8ee815d24435edc87e65e764b9add4c95024bbb06fd381924c752d7dffa268c8
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV, indicating a phishing attempt. The presence of embedded URLs, though many are marked as benign, suggests an attempt to redirect users to malicious sites. The PDF structure itself contains elements that could be exploited to deliver a payload, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier clean score 0.2210

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/cEZ-xJcQpFE/square?utm_term=crossword+clue+stage
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eca4a31996685841abcf2f/1626121379741/90978442198.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edec0bafeffb59e6736835/1626205195346/48575977770.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_off0000d0e8.bin
a493a0028ad00be649b716e3963c927ecbac94c39499a9a56e824fa9fb33edbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E8 10564 bytes
font_01_sfnt_off0000e90d.bin
0f7144e17e7f0dfbda904473085e3ab52abc8b1af5f7b6020bd6a60e36e1d7e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE90D 16436 bytes
font_02_sfnt_off000113b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113B1 16792 bytes

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