Malicious PDF — malware analysis report

Static analysis result for SHA-256 0801fbf40631407b…

MALICIOUS

PDF

72.8 KB Created: 2021-07-21 08:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc189e19c87068bf6af76ecfdbd8c712 SHA-1: fa21eed185008541005409f7d45682821d66a70a SHA-256: 0801fbf40631407b545386dfcdc590276031091ccc3f7064f82f9c1831a7143a
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. The heuristic 'SE_URGENCY_LURE' indicates the document uses urgent language to prompt user interaction. Although no scripts were extracted, the presence of embedded URLs and the PDF structure suggest an attempt to redirect the user to a potentially malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.1797

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/iCUEKX862tE/square?utm_term=meaning+of+exempted+in+tamil
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e945a1f4fe78435a3bddba/1625900449915/vugudosenararujogiduzinid.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee3543462f394a1e418af0/1626223939172/table_html_footer.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_off0000bcb0.bin
58bcead75c15048216ec45ac1a71b0364d96aff9b5832e8549a29539a4e0b88e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB0 16472 bytes
font_01_sfnt_off0000e793.bin
31f3e9b775fdd63c853f0fd195b2daff96d0d96410d040d21daf78ed4466d03d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE793 10668 bytes
font_02_sfnt_off0000ffc6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC6 16792 bytes

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