Malicious PDF — malware analysis report

Static analysis result for SHA-256 056de68958e0bbb5…

MALICIOUS

PDF

78.9 KB Created: 2021-07-14 07:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8345e0f57707d210053a31510de7abfb SHA-1: 9cb91a9e9495973770670eed03b81e1aa38577e8 SHA-256: 056de68958e0bbb5de15e568b6cac106317097b6cc1feaef101e53572d272028
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 presence of embedded URLs, despite some being marked as benign, suggests an attempt to lure the user to external resources. The PDF structure and heuristics indicate it is likely a phishing document or a dropper for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8374

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/HbdJGeoIq_s/square?utm_term=retractile+testicle+in+grown+man+treatment
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e80e0597884458c9a3a5ff/1625820677180/how_do_dividend_payments_work.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9aab3631fd4ab8184e75/1626118827923/be_more_chill_off_broadway_cast.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee01c9e83f616bcf86a7d6/1626210761551/letter_grid_procreate_free_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e90cedf492d21a0f6a1a99/1625885933148/wodojanimuzes.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee205aa005482cc154195b/1626218586779/how_to_copy_and_paste_file_into_excel.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_off0000d408.bin
96a8cde82e330aee6ae90a95371b3ac9630e7b73f964497205ef02f6b3d2c94b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD408 10704 bytes
font_01_sfnt_off0000eca5.bin
dfc754ed8864a739515cc534a4a97d3b1189bd23692ce7592b6b36be8a7198d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 16576 bytes
font_02_sfnt_off00011799.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11799 16792 bytes

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