Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f2c12d777dcaef…

MALICIOUS

PDF

80.6 KB Created: 2021-07-13 15:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20df528f8b762e12b183a93d5e303a08 SHA-1: 051df2cbdc7e9852310f993c2171b6d120ce1166 SHA-256: 40f2c12d777dcaef9eba91220259e02423ea53a1ba0db7880ed86b0ce357ef32
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 point to external resources, suggesting a phishing or malware distribution vector. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6198

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/NsX9ihectO0/square?utm_term=do+not+lean+out+of+the+window
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed733743ec04194fd846c2/1626174263855/wicked_minds_full_movie_watch_online_free.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7a22b8cbe518df56efd9/1626110498650/64442381617.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8d6251058581513769b47/1625871909540/gibivekax.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_off0000dcbc.bin
3df0ba4ce04bbd62f2ff8f4db8c0d1fb09bd4044d451fa3b8d25afac8993f3cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBC 16400 bytes
font_01_sfnt_off00010752.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 16792 bytes
font_02_sfnt_off00011f69.bin
7928a44e8d88b9bebecc24fd7b29d569c1d724837dfe35cebee6017954ef47b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F69 10368 bytes

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