Malicious PDF — malware analysis report

Static analysis result for SHA-256 86922a53a96c1609…

MALICIOUS

PDF

79.4 KB Created: 2021-07-15 18:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 041ddd65c7e1554b29c63671bebd4ef5 SHA-1: a10ac7efccd7075cb1929954d167ed6860211047 SHA-256: 86922a53a96c1609268bbd624f755090da301e1ec8ec00e79978633fbfdc8cee
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, suggesting it may be used to redirect users to phishing sites or download further malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are common in phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8134

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/iXsW93xxTQA/square?utm_term=table+tennis+rules+pdf+2020
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7c84ad4a1a22a3e6b86b/1626111108659/canned_tuna_for_baby.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed89d4a17c7f1bf005207a/1626180052659/clinical_anatomy_of_head_and_neck.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee8ccf6d75c50a5d480cee/1626246351705/11398220109.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e94866c0906550d90c75a7/1625901158132/kobolerupuru.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8d2144349d7bb06cf474/1626115361660/keep_your_friends_close_but_your_enemies_even_closer.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_off0000d2b3.bin
10fdf5bb2e84143323c486e16ddc10ad917c2de8888a4c0b08b090e6e87f77f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B3 10816 bytes
font_01_sfnt_off0000eb9c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9C 16792 bytes
font_02_sfnt_off000103ae.bin
669714df3a6d711f54028a6c1fd7ba25e9e89d728e85a2ad589b7d0e7528240c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103AE 17144 bytes

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