Malicious PDF — malware analysis report

Static analysis result for SHA-256 e048920a49d01d70…

MALICIOUS

PDF

80.5 KB Created: 2021-07-12 20:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d35012c5fbbb8dfb53480f48ca4735fd SHA-1: cf88c19581fc78225f556391b3ffaf05234a16da SHA-256: e048920a49d01d70e1f2cdaafd1103a784e3a0b965c4eca12ce07a3e247c6ce2
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are new payment instructions, a common tactic in business email compromise. While no scripts were directly extracted, the presence of embedded URLs suggests potential redirection or download capabilities, aligning with T1566.001 (Spearphishing Attachment).

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/eoPDrVzwpx0/square?utm_term=housing+service+charges
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec78f8ad4a1a22a3e65b7d/1626110200647/54887924892.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9319c6e267257943b67e0/1625895324342/iso_10017_free_download.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ef9a2c5c2f6215c6e488/1625878426733/numufimiki.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_off0000d845.bin
5d72214d38f74999885d4918a41e50c14b4f0740067277c5a82acbe240bf0a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD845 10520 bytes
font_01_sfnt_off0000f02b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF02B 16792 bytes
font_02_sfnt_off0001083d.bin
bf21b87f6c93945550208cade597ffaaccae00af43059c4d8518a42c158aac3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1083D 17132 bytes

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