PDF malware analysis — malicious · a53163601fad62e7

MALICIOUS

PDF

78.0 KB Created: 2021-07-13 13:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 9d9f5bb0b8b9d8137140afb60ea0b11c SHA-1: 8114423b13bbf8c78822a1900a306e5379ac70a3 SHA-256: a53163601fad62e78dd02e17832f3d2a66fdcaf28ed1b57f46c9e46d86863720

136 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a heuristic indicating a 'Clipboard command execution lure', suggesting the document instructs the user to copy and paste content into a shell. This is a common technique to bypass simple content filters and trick users into executing malicious commands, likely to download and run a second-stage payload. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9163

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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/eoPDrVzwpx0/square?utm_term=got+me+excited
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92b1a2210ba6bce128724/1625893659036/lopanibov.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7b854bab0621613368abc/1625798740996/83916729788.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7d728bab06216133842e9/1625806632152/trans_pacific_partnership_agreement.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e851ae53d6ed6d7600fb55/1625837998623/gdp_is_the_total_value_of.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e828dbd0799e4214c363e0/1625827548240/66799790996.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8d449c874e7142486387/1626115396255/3399748163.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e96122c0906550d90d0864/1625907490542/painting_terms_art.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d0f8.bin` `00e7d094a8ea1ba904a7ea282ad3f5eeac9b692b2b11b99d68cfa8b8aa25ea8f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0F8	10092 bytes
`font_01_sfnt_off0000e782.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE782	16792 bytes
`font_02_sfnt_off0000ff94.bin` `8378434a2b401535a65b13bd65b9e058ed55e330bed6d4723753728cd7196400`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF94	16636 bytes

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