PDF malware analysis — malicious · 9d94315c1ae3d286

MALICIOUS

PDF

72.9 KB Created: 2021-01-06 19:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02

MD5: 9472569005fb8eea6e5354027620e32d SHA-1: c079ef347210b50159ce281ea09fe5e5257f6f6a SHA-256: 9d94315c1ae3d286aeece628967da24eb7a92b7c4f0eef80aca534e626310991

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffset.ru', which is likely used to redirect the user to a phishing or malware distribution site. The presence of multiple obfuscated PDF objects and the use of wkhtmltopdf suggest an attempt to evade detection.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=can+you+backup+android+to+icloud PDF link annotation
- https://cdn.sqhk.co/tobafixola/HE1jiBJ/tavabixidujipumatavavoge.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402297/normal_5f97ec948108d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4424349/normal_5fcc623b3a7d2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486535/normal_5fd648263c8b9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392659/normal_5f91c5f51acee.pdfIn PDF document text
- https://cdn.sqhk.co/jajotulix/hNb1gjT/85123794302.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380411/normal_5f8cf62988360.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367903/normal_5fd13b620dfbe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4407997/normal_5fd273b41bf4c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408195/normal_5fb29fe931a96.pdfIn PDF document text
- https://cdn.sqhk.co/kufalavoxig/eXShhji/jedukovefunutus.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e088.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE088	5100 bytes
SHA-256: `84233cd641de577cf1306aa5c8f4834f89b6f2e244211d0e58784ab8fd3b650b`
`font_01_sfnt_off0000f1f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1F2	10740 bytes
SHA-256: `07c92323597dad2eec3b4403a522f1ac16d95fa93fec319ab4e29f598de87535`

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