Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27b31849e8840bf…

MALICIOUS

PDF

89.0 KB Created: 2021-07-14 02:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b34ff04aaf8159f7f01c700fee065e41 SHA-1: 38139ae330ef667117f20b8d5fc77db0ecc257a4 SHA-256: d27b31849e8840bf3b3cd8bb1e65b5a1f11aeb685cd7ee36369a66f6aac1951f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a Pdf.Phishing.Trojan signature. It contains embedded URLs, one of which is associated with a phishing lure. Although the document body is truncated and unreadable, the presence of these indicators suggests a phishing attack. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier clean score 0.1532

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/~3/4P1vZUbBa90/square?utm_term=normal+pituitary+size
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e93d912210ba6bce130fac/1625898385785/rapeseed_oil_for_babies.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_off0000fae9.bin
16ba0f488def8f743e9044b3aa0f4473b068a386b158e2daac08de8008e0af10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE9 17292 bytes
font_01_sfnt_off0001287f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1287F 16792 bytes
font_02_sfnt_off00014096.bin
2dcfb80b2aa1a4573561105e27e79b2b0bf3ec7d474b959bbe9218ff035315e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14096 10560 bytes

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