Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5af0df8e908332…

MALICIOUS

PDF

75.2 KB Created: 2021-07-17 00:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b5f72528b44b4709bee3ff5c212da4b SHA-1: d89e96d6be53d3c07f370ffd4d1587f21399995c SHA-256: 4e5af0df8e9083324be2660f15204629ed078a79855b31e55c271a832694e6d4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that are likely used to redirect users to malicious sites. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7746

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/iCUEKX862tE/square?utm_term=spiderman+coloring+online
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efd113e00eb31d7cebf0c9/1626329363379/ext_meaning_script.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee51af2a4cda17625f5e88/1626231215489/within_the_context_of.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1ff4c9e49555ff678cf60/1626472268400/future_continuous_tense_definition_in_english.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee0443c6126f45c3e6168e/1626211396020/songs_with_word_painting.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_off0000c651.bin
b3c7c8fefd67fca010478ee5370f430ca1b022cf0ecfd621f111c1e066135a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC651 10664 bytes
font_01_sfnt_off0000de6f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6F 16792 bytes
font_02_sfnt_off0000f681.bin
0f70f4724defc13b84d665891332a6820fc4a0fdfa71f793522334f10b10245f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF681 16452 bytes

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