PDF malware analysis — malicious · cd00d6ad830cfbde

MALICIOUS

PDF

92.8 KB Created: 2021-07-13 23:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 304875d3e011f2668a4443fe807e140b SHA-1: c175dfead9b31e6f88c6fc61446e0d5f36cf32dc SHA-256: cd00d6ad830cfbdec96ca7634214b6e018182ca2a26b81510c36dbabbccce30a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that likely leads to a malicious site. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to redirect the user to a harmful destination, potentially for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.7434

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/~3/5Aj-mlxkUx8/square?utm_term=another+word+for+bad+reputation
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e843718fb0dc0613f13891/1625834353330/windows_flying_toasters.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e768b4ae6cb774a92613a1/1625778356717/58040303266.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edcb06ea8d40126a19f03e/1626196742917/affordable_auto_salvage.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7ef4df4d7c53d8b140667/1625812813571/sewalef.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7b11e46a8e17713e2a93f/1625796895023/deweporawozowikanul.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec819f154eb17b6849c94c/1626112415852/kebasevixetuwusujopege.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eca99c7d354a5e86a69508/1626122652599/past_tense_of_choose_in_english.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
`stream_005_off00013b6e.bin` `439e022c59d950061603262341e87768736db13512ac55297b563e433fa1da40`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x13B6E	23904 bytes
`font_00_sfnt_off0000df97.bin` `ffe7d9d947b7e3b087bb4c0497e5302c773056c14ce43c0068a2444b33d4a3ca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF97	16824 bytes
`font_01_sfnt_off00010b17.bin` `f5cc4063a3d0c3f52eb4800b85e714c4b37f1da96962550b98f92d6ea4462996`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B17	10688 bytes
`font_02_sfnt_off0001235d.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1235D	16792 bytes

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