Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b989bee2dcae4b…

MALICIOUS

PDF

72.4 KB Created: 2021-07-16 09:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74536abfde1fe8b265eb8a25fe95647c SHA-1: 8b397c220cf7d0322022a3a812c5c55db7c390cc SHA-256: e8b989bee2dcae4b149d5c2e914c560e97b568e675306083e672ad2c0a7e11d5
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, though many are marked as benign, suggests an attempt to lure users to external resources. The file's structure and metadata point to it being generated by wkhtmltopdf, which can be abused to create malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7342

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/qI_NY8u86tA/square?utm_term=company+profile+for+startup+business+pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee0245e635d71664659d5d/1626210886134/bikenegimapenozaxuker.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e910ebc91b61347ea30aae/1625886955343/popikoramalila.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60efde1f1fe2fc56fbe4379c/1626332703675/5388350387.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_off0000bd94.bin
dbb0ef0740799590710b24429cdb3ae05f554fe45a0b890f32fc96f32634944d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD94 15136 bytes
font_01_sfnt_off0000e40e.bin
b2faa5266f60c6344ed7efc8a3e7cc689e13c9c4c22cdb9d78c66fecddeb2cfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE40E 11044 bytes
font_02_sfnt_off0000fd8b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8B 16792 bytes

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