Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a641fd38fc8b06…

MALICIOUS

PDF

76.5 KB Created: 2021-07-17 06:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0a6146e78d7e50033abe9c889691db6 SHA-1: 824d5e74275c6a8a4434e64d69eaf566d4fe84f3 SHA-256: e0a641fd38fc8b065f2028c535ca1493942642d1541238e9de6fd5ea35bb2b0d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document detected as malicious by ML classifiers and ClamAV. It contains an embedded URI that points to a URL commonly associated with phishing lures. Although the document body is heavily obfuscated, the presence of the malicious URI and the detection verdicts strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9260

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/qQn0o4eTdIQ/square?utm_term=recent+cybersecurity+attacks
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f22715d9389f5e8081a4ee/1626482453753/18691465766.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e90d375fa2eb14b90ae0a2/1625886008057/personal_pronouns_live_worksheet.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec81df12c1416d2f1ab00c/1626112479570/girinetepadomafo.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edf5432799685454fbb142/1626207556077/how_to_check_a_snap_story_without_them_knowing.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60effaa0fc6647025a36c3a3/1626340000650/kudabaxefumakuzuxaxowot.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8d01efe8e797825e45c5c/1625870366450/69142384118.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_off0000ca62.bin
18e9af8c02bcd80969e64b2169bcfc8509a8c7d6994cfc9e2e8abbb598509ead		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA62 10548 bytes
font_01_sfnt_off0000e2a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A1 16792 bytes
font_02_sfnt_off0000fab3.bin
267a85f303472e2b416e9ee5770da4d88671d4264f03313df6d1451f9f735e78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB3 16636 bytes

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