PDF malware analysis — malicious · bb197b64a279cb4d

MALICIOUS

PDF

78.5 KB Created: 2021-07-15 22:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 9cd0bac5a8f35b977767cb7d685e09eb SHA-1: 44549cfea099b40bd9f2d2d8fc3e0c488381030e SHA-256: bb197b64a279cb4d6c25203ba174b401eb5370cdeff4d773b95720fd6d935288

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a Google feedproxy URL, which in turn redirects to a PDF file hosted on squarespace.com. While the destination URLs are marked as benign, the overall structure and heuristic firings suggest an attempt to trick users into downloading potentially malicious content. No scripts were extracted, limiting the analysis of the attack's execution phase.

Machine Learning

Nyx PDF Classifier malicious score 0.8755

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/v-xubMviL4Y/square?utm_term=anatomy+and+physiology+12th+edition+pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e94265defa333328ab8233/1625899621649/total_relative_frequency_table.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92bbc27127e680416560c/1625893821164/groin_muscle_location.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee64a85f7927514e3fc721/1626236073005/14538060335.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f055c9baa9e46167490eac/1626363337508/table_tennis_rules_2020.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0036738a0fc3ca968b0ff/1626342247824/dodexexilesakemasebanaw.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7fd6845e16b3be7eb2780/1625816424188/batch_file_wait_for_command_to_finish_before_next.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8258695719b356d95d9e2/1625826694628/38964110217.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_off0000cf32.bin` `74c890ae6d93edc2ffa08f2c421bc4a9862e04fde567e6433229a495385492a4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF32	11112 bytes
`font_01_sfnt_off0000e8de.bin` `7a9686fbbe07f0b8023e25c9c6a768fc31f60c6c2a095250923ac879b633c327`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8DE	17112 bytes
`font_02_sfnt_off0001159b.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1159B	16792 bytes

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