Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a072840a5e7f21c…

MALICIOUS

PDF

74.5 KB Created: 2021-07-13 16:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 963d71a3667b1271f014a939c041b84d SHA-1: c83546a7f45ea3fbc7cb4759e79cef8155da2aef SHA-256: 9a072840a5e7f21c3f3d5efff14e10a18227667036508faebf361328ee9078a0
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Phishing.Trojan' signature. The document contains urgency lures, such as 'account will be terminated' and 'action required within 24 hours', indicating a phishing attempt. While no scripts were extracted, the PDF_URI heuristic points to an external URL that is likely part of the phishing lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2686

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/v-xubMviL4Y/square?utm_term=the+open+society+and+its+enemies+vol+2+pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8f9f9c874e7142489ca4/1626115999137/treatment_for_collapsed_lung_pneumothorax.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8c06237c4677c3461893a/1625866339051/zawipipepajiror.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_off0000c05f.bin
41afcd5656b4c9ce5232661af1263b440c8d970600d1e55e044acae8c54e1034		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC05F 11048 bytes
font_01_sfnt_off0000da01.bin
ba290923064831e6435957e1ed2655a58fb79e6835830fb735559d9bf36fb24e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA01 16816 bytes
font_02_sfnt_off000105de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 16792 bytes

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