PDF malware analysis — malicious · e1a56561d32e7d76

MALICIOUS

PDF

77.1 KB Created: 2021-07-16 04:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: dbc75b800fb42c9ac30991f81d5d7f18 SHA-1: 0b3fceb13a9c12601d78090939acb4311316fc98 SHA-256: e1a56561d32e7d76c3b30fb067a6a2e9fe040164d603c110cf08f358df01e6f1

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a URL that, while currently marked as benign, is suspicious in this context. The PDF structure itself is malformed, with duplicate object bodies, indicating potential obfuscation or an attempt to bypass detection. No scripts were extracted, but the presence of an embedded URI strongly suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9163

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/jEScUJLm1bs/square?utm_term=free+child+travel+consent+form+template+uk
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7c7957be683581ce1a929/1625802645771/waste_management_new_plymouth.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e82ab54aaab0286a8dd46e/1625828021315/forget_the_gun_take_the_cannoli.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec87ae8300fd66e196bc6a/1626113966704/cfcs_and_the_ozone_layer.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e93236c91b61347ea444ac/1625895478161/wefid.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eda5582d9f403b52124a27/1626187096760/english_reading_materials_for_grade_1.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed15cc493b4338208994ab/1626150348635/sat_exponent_problems.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0bcdf3710375a26a11f9f/1626389727941/dezif.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_off0000cbfc.bin` `708c1207eb4ae128018c53c86cc60519fc1338520625441497379acbb1094af6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBFC	16368 bytes
`font_01_sfnt_off0000f686.bin` `66ddb62c9d2642157edb952f7089f8d0ef8a42339f9b07c2f1ceecd8b3cd46fa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF686	11120 bytes
`font_02_sfnt_off00011045.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11045	16792 bytes

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