Malicious PDF — malware analysis report

Static analysis result for SHA-256 3afec42102d53413…

MALICIOUS

PDF

75.0 KB Created: 2021-07-20 05:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d3436c16bb42be5c43d67ddc6fb2b9b SHA-1: 4384f32249efeac98562965daba5b5793f27a5f4 SHA-256: 3afec42102d5341335f92fdd624a0fc39992be3fe68e085e32bacd9ff5eda7f2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of embedded URLs, though currently classified as benign, suggests an attempt to redirect the user. The ML classifier also indicated a high probability of maliciousness. The file's structure and detection as a trojan point towards a phishing or credential-harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/-7-cX3opz_8/square?utm_term=princess+pictures+to+color+printable
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8e331787dde1a90aab609/1625875249674/29841160787.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f143d96e3a8560b3d3bdbf/1626424281896/84092522993.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edf374ba7c7f743c1f8a42/1626207092776/whmis_quiz_with_answers.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f090df9ddd2b2703197148/1626378463609/purepenorusumunemugan.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_off0000c697.bin
616d4506eec55bb7e3a35370434b124f4ca7c33a75c595b13ce36ff380cb6995		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC697 16040 bytes
font_01_sfnt_off0000efaf.bin
0544d9d08b3919f95f5d08ddbd68d5535ddc75225e55b61c2ad81b38945856a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 10608 bytes
font_02_sfnt_off000107d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107D0 16792 bytes

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