Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc2ffe9c4b9e325…

MALICIOUS

PDF

78.6 KB Created: 2021-07-15 11:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a5b0f2beab48fa454269785d3217bcc SHA-1: 57effede3ec04f0c8ec05e559cf51fbea9f4be1d SHA-256: bdc2ffe9c4b9e3259d1e4501285caec91800b7e381f8ff1baab32a56b66322ef
96 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file was detected by ClamAV as 'Pdf.Phishing.Trojan' and also flagged by an ML classifier, strongly suggesting malicious intent. The presence of embedded objects and external URIs, even if currently benign, are common in phishing lures. The primary attack vector is likely exploitation of a PDF vulnerability to execute a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8134

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/eaN1Eb74jJI/square?utm_term=ready+player+one+race
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60efcab016a6d35a11110211/1626327728505/most_smelling_flowers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8cc44f28789513b645ab3/1625869380459/famous_dental_clinic.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee2dd85f7927514e3c1122/1626222040203/vuvudefogixi.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee58b1b82b3047686215ab/1626233009849/24310814895.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9181b6e267257943a8021/1625888795478/peditakase.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_off0000d04a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD04A 16792 bytes
font_01_sfnt_off0000e861.bin
b893336fe5224ccea038bc7f2ebdec165e4928cbb16b1a20b51dd380d1a3ca0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 10308 bytes
font_02_sfnt_off0000ffa8.bin
b0b776b12824fd99d7c7cf9d9cef81c30aac26aaf383d3dc725694c7f8c7e683		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA8 17428 bytes

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