Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04aeb15feeb0441…

MALICIOUS

PDF

88.2 KB Created: 2021-07-16 11:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9edffe106ff6ee91283c0f89ae28fbb SHA-1: ce5b0e66001e11ffcb1ea5d57cfb2febee11e0a6 SHA-256: f04aeb15feeb044128cec856d982cfe39ef7620a07b1b0992eaf03e7bc7fe6e5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to external content. The PDF structure itself contains malformed objects, which can sometimes be used to exploit vulnerabilities or obfuscate malicious content. No scripts were extracted, but the overall context points to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

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/razvivatel/yapz/~3/1LSSs5qy-i4/square?utm_term=chicago+to+athens+flight+time
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f09af9556f6b60d0c09c41/1626381049925/78432718392.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec7e4b7726b430b467bf71/1626111564011/bow_wow_ft_ciara_like_you_mp3_download.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e85fb366e2de6b862605b1/1625841588033/88306126493.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed8a6e66c2900cf5622e0a/1626180206332/walatumulixem.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee71767426fb5109f7be69/1626239351027/tujuvekisu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e809f725441e1b3787c871/1625819639278/pibovutew.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_off0000f4c1.bin
b6c65ae88593d406cb69667424f02834346e3164ec5d7dbcd5a1c9691cdb7a80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C1 18044 bytes
font_01_sfnt_off00012434.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12434 16792 bytes
font_02_sfnt_off00013c4b.bin
4a94cb08ffae33f59f2a6911e10faaa413261150aae9a42491a6477fbdb9ccd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C4B 10716 bytes

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