Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7f89d825145ce4…

MALICIOUS

PDF

123.8 KB Created: 2021-07-12 22:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34841b704351950540e31be0d7afe8b2 SHA-1: 82b16a4257e096ead8436fae83e786862398ea0f SHA-256: 5c7f89d825145ce45e215f565828c41e7305c90be2b7f248215176982f960dba
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan, indicating malicious intent. The PDF contains multiple embedded URLs, some of which are confirmed benign, but the overall structure and detection suggest it's designed to lure users into malicious content. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4686

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/XMoLd4EPXkg/square?utm_term=beethoven+choral+works
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7f71ee8ef4d41b4fbe7b4/1625814815029/84039878565.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec90a4c426b81e8300fb1c/1626116260338/pepixitaf.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e77e7c8a1e29062002154c/1625783932972/wander_in_different_languages.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7ac4d81ab8d1aa9dc8488/1625795661996/raxokidis.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_off00017fd2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17FD2 16792 bytes
font_01_sfnt_off000197e4.bin
039d4fe9d4e2aeacff36e76ff952a2ed78e0dafab68d492c9ad394b986a1012b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x197E4 20720 bytes
font_02_sfnt_off0001cb7e.bin
3c102a703e913a23293f54d950bc2926744d37f8ba6f47cb268aaa3611f413e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB7E 10532 bytes

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