PDF malware analysis — malicious · a0eb86ec0bf37af4

MALICIOUS

PDF

78.5 KB Created: 2021-07-16 11:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 73d88efd50b27bd99078f3f800cb751c SHA-1: caf37cb8195ba42e87c0c0fc09666744b000e1b3 SHA-256: a0eb86ec0bf37af4ae7a2f65c8a56d9aeb5730f5fbcb79a637e49602a8d7b1f1

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains an exploit. The presence of embedded URLs suggests it may be used for phishing or to download a secondary payload. The wkhtmltopdf authoring application is unusual for a malicious document, but the overall detection profile points to a trojan delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9478

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/y83TWYo-3DA/square?utm_term=the+magic+school+bus+and+the+climate+challenge+pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0c5b91f3fa43bb6b3a601/1626391993575/heaven_earth_will_pass_away_but.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91a36b10b9b33fa978184/1625889334860/93956239204.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8136d7be683581ce4a31e/1625822061341/sleeping_all_day_staying_up_all_night_lyrics.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee4465ab0cb8743be4fe5b/1626227813835/make_selected_area_transparent_photoshop.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0c76078fb23041afb977e/1626392417024/tofekamerawawewonuwonu.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed8d90f95b5524f9551805/1626181008756/bodyweight_squats_for_mass.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e86f27574275143a08e984/1625845543697/what_kind_of_cheese_is_made_backwards_riddle.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edc1d94c056a31b818416d/1626194393804/32960492897.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_off0000cfd2.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFD2	16792 bytes
`font_01_sfnt_off0000e7e4.bin` `32a22a4b242ee2d6a849f1088bfc469657f05ce148faefee0e0cf55daf3240c8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7E4	16440 bytes
`font_02_sfnt_off00011266.bin` `60f6802cc446c7dc06f32b5db7535e9f7a76b705e5bd149e81a4aa0d999cd279`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11266	11172 bytes

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