Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad194926258717f…

MALICIOUS

PDF

78.0 KB Created: 2021-07-19 19:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10e369b9755871abda07be264c6bcac4 SHA-1: 4166cbb0722f0480291fd517278d0563a0e9cf35 SHA-256: 6ad194926258717f34f8f67cdff90f8a9fffedb70383daf8bbb2b76f9a0981e2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The embedded URLs, while mostly benign, suggest a phishing or credential harvesting attempt. The ML classifier also indicated a high probability of maliciousness. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern points to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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/RVI1sXQGPkU/square?utm_term=best+way+to+treat+a+pulled+hamstring
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eddd682799685454f8eda6/1626201448301/boderifizefonujosogetid.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7a914dbb92d34f5ac03e1/1625794836597/velifabon.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92ef36e267257943b5293/1625894643965/67234630262.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edaaa2ac23c31e62fe7bc9/1626188450762/ds_cia_games.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_off0000d24e.bin
060dee3c8c51061f86a7fffd3aae356d389d6839fdd3d8890951df0195fb627a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD24E 15608 bytes
font_01_sfnt_off0000fa51.bin
c07b0f8215eef192f3cae2d4be17a0d0aec37962db1741063c1f20bf8cc64816		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA51 11192 bytes
font_02_sfnt_off0001143a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1143A 16792 bytes

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