PDF malware analysis — malicious · 1645f8733e54b549

MALICIOUS

PDF

91.2 KB Created: 2021-07-19 11:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 5ea55fc4e94490c70c48802f365a6de5 SHA-1: b66cd3737176b0e1a466f04ff596504986041a5c SHA-256: 1645f8733e54b549c48094999b3fdf0bc35f85f4870f31df694c75d761d8a265

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The PDF_URI heuristic indicates an external URI was found within the document, which is a common technique for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9464

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/CcIy6vlvkUk/square?utm_term=mayan+revival+architecture
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f16adc15846f0d14edafef/1626434268886/nsg_care_plan_for_pain.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8cf85f8bf969071e6b36/1626115321254/64504630866.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1da78952a081d9377567b/1626462841021/20907450573.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f3eb519c7c9f0ea9a0408d/1626598226293/identify_project_scope_and_objectives.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f08389d062d015cc400488/1626375050100/36241430620.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93d5ec91b61347ea488f4/1625898335149/least_stressful_careers_that_pay_well.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec98d59c874e714249cb94/1626118357571/4294150011.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2cebd503a2167178b1a30/1626525373868/list_of_foods_to_eat_with_no_gallbladder.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_off00010478.bin` `59781108f0d67618b4be338b9d0c2ef73c4dfc642904c52e09db4242852cbd0f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10478	17840 bytes
`font_01_sfnt_off00013254.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13254	16792 bytes
`font_02_sfnt_off00014a6b.bin` `e85d69296de97d608005eedea3c97986a3b43b566cdd4272a7aa1df15496d9a3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14A6B	10312 bytes

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