PDF malware analysis — malicious · 1d7e55f97379b263

MALICIOUS

PDF

85.3 KB Created: 2021-07-14 07:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 36b06986e622a53a5c9392f33f02c037 SHA-1: b60b2fb474fb9e008b3f4371d1297c25e9e7a3ea SHA-256: 1d7e55f97379b26368c9bd376b7abfb1f9e09b2625f97294ae997f6b0ef1f081

104 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of external URIs, even if some are marked benign, suggests an attempt to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.6233

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
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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/y83TWYo-3DA/square?utm_term=what+does+am+and+pm+stand+for+in+english
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edd8b0a0f2ca3483d15c4b/1626200240782/specific_heat_of_water_equation.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec88abb8cbe518df5866d7/1626114220174/jitadodosaxavozipudave.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edb4879a9df7051d416c6e/1626190983678/taxobinixipojufi.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edd1a1a9aa746350ca7e97/1626198433343/math_questions_and_answers_for_4th_graders.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee02e6e83f616bcf86d147/1626211046419/36016271397.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee554539b82603386bb0ea/1626232133436/quotes_on_finding_myself.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d41d.bin` `fdc3f250e16d4eeaac0151c08e1678493ac6cc67090af3137bc700c4cd553891`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD41D	16348 bytes
`font_01_sfnt_off0000ea74.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA74	16792 bytes
`font_02_sfnt_off0001028b.bin` `df8fbaa037982bf8667d3c6d4a923f925c385cc121f453761c1a2ce2dfd4e2b7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1028B	10940 bytes
`font_03_sfnt_off00011b72.bin` `850a48e6c8912a3ea0b82970b492add1aaaf974949d4c762f521fb6f2ebff64e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B72	16748 bytes

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