Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc046d38653dd942…

MALICIOUS

PDF

86.6 KB Created: 2021-07-16 06:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cffbebf704a8098f5940877d0f387d7 SHA-1: c7740ee4974a735d177de63478bb1297277d3eda SHA-256: fc046d38653dd9422714996faa9e7e8f3cbbd78c80ed3a0b932c7888a2dcaf52
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as a Pdf.Phishing.Trojan. It contains multiple embedded URLs, some of which are marked as confirmed benign, but the overall detection indicates malicious intent. The PDF structure itself is also flagged for duplicate object bodies, suggesting obfuscation or malformed content. No scripts were extracted, but the presence of embedded URLs and the ClamAV detection strongly suggest a phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.1542

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/eoPDrVzwpx0/square?utm_term=icse+geography+question+paper+2003+solved
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0ba3ed1fa142bcea9d9a3/1626389054967/one_night_at_call_centre_free_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8b69fe6e510241f6ca058/1625863839120/write_an_exponential_function_given_two_points.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_off0000ed32.bin
53b79fb3d91e8730868142cbcadbc8545beeb89d2499e305ad6fa1e25dabba5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED32 11584 bytes
font_01_sfnt_off00010839.bin
417327982cb1b9d938f60e701fcf4d72a4ef208c0bed748d3009906671d384b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10839 17504 bytes
font_02_sfnt_off0001364b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1364B 16792 bytes

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