PDF malware analysis — malicious · f72d0d09d440604f

MALICIOUS

PDF

78.4 KB Created: 2021-01-08 07:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 398085f46004938aaba70b3ca8826da3 SHA-1: e1e8daeb8d2aa358077d9a2687106456e13dfc79 SHA-256: f72d0d09d440604faa5969161c6927f34dfbbc72931b039ab2e7b4e0a5ae5e11

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains references to software and operating systems, suggesting a lure for a download or update.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://trafffe.ru/aws?utm_term=whatsapp+for+windows+phone+nokia+lumia PDF link annotation
- https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/dapixixe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4374983/normal_5fe1349438e9d.pdfIn PDF document text
- https://cdn.sqhk.co/rifokinimito/epAtqhj/powered_subwoofer_bass_tube.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379491/normal_5f9f1315c628f.pdfIn PDF document text
- https://rubuvewoxuvima.weebly.com/uploads/1/3/4/8/134873715/7540516.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/25095d45-0f5e-43db-b935-896eb1512f45/kokakov.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/368694e9-41c0-42cd-91d9-8bd8672c7856/62784472945.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8c1b962b-3a34-4b4b-a05a-c3be0f5501b3/35267549070.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/84d07f22-6914-483b-9d73-80f9df7839bf/wisuzi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bb308166-d777-419c-a7db-eb20a55b6272/84303463668.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f51c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF51C	5448 bytes
SHA-256: `d05cd1ab99bd09a3c216a57307dbf037a4c433415b1311343e836a4a38e8d78d`
`font_01_sfnt_off00010796.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10796	10888 bytes
SHA-256: `df496e2c17ae2b5c1b35be274c922f0f876afe41e4d22bd55bc5749258046f37`

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