PDF malware analysis — malicious · 81fad5839222e944

MALICIOUS

PDF

82.0 KB Created: 2021-07-18 18:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 0bb35e2db2db8f177016e89b6471de4a SHA-1: 28c6655231c0104f3f42ae140da8720985dc4a66 SHA-256: 81fad5839222e944f8f40a32d34389a07d88c15bf28ca373a224a2423749a411

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is flagged as potentially malicious, suggesting a phishing or malware distribution attempt. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, pointing towards the document's role in directing users to external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9438

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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=olympic+soccer+qualifying+2021
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f3893c0b17490892109d76/1626573116786/to_the_lighthouse_summary.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1c5618975fd1a6a63df99/1626457441898/2nd_grade_word_problems.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f3d0399ee5897bffa75f27/1626591289358/simple_monthly_expenses_excel_template.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8e171cff58014d547177/1626115607630/octagon_lines_of_symmetry.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f372dac2d40e67ec0c93e0/1626567386689/joridi.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee8c05537273346e3406cd/1626246149563/67778504756.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8acd151359a2b5cfc0da7/1625861330078/40858242794.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e778cda154b3187e2e4d5f/1625782477952/our_lady_of_the_pillar_seminary.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_off0000dc5b.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC5B	16792 bytes
`font_01_sfnt_off0000f472.bin` `8b432393d119b3032f04fe2d672b9c745ec9a3eec69313899924dfd6144b6b66`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF472	11404 bytes
`font_02_sfnt_off00010f17.bin` `31cfe03117deaae9d7b57f4e552f82df969026e5e0b9b172a4e4b85a50275f06`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F17	16800 bytes

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