PDF malware analysis — malicious · d116dc27c0df8406

MALICIOUS

PDF

64.9 KB Created: 2020-12-08 17:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 18da25cabc50ce8b1321d20e44eebe85 SHA-1: 2e68d13b377937b6338b83ad7b8a999d4d9a6836 SHA-256: d116dc27c0df8406b8ae5901ec7de902897e6c7a47dc5861a9cedfb53279cf25

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, traffset.ru, which is likely used to host malicious content or redirect to a phishing page. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the external URI and the high confidence score suggest a phishing or malware distribution attempt.

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://traffset.ru/strik?utm_term=big+snow+outfitters PDF link annotation
- https://cdn-cms.f-static.net/uploads/4366964/normal_5f89eae86f8ec.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4461481/normal_5fc112e4b6dfe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4382972/normal_5fc541ff71ce1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365591/normal_5f87019302039.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://static1.squarespace.com/static/5fc28c84be9b6939511547ef/t/5fcbffd45177ea328cad6945/1607204821058/17917127968.pdfIn PDF document text
- https://s3.amazonaws.com/batoragubukepo/jenagigusesumufiledib.pdfIn PDF document text
- https://s3.amazonaws.com/bevarolimesale/bimewezulew.pdfIn PDF document text
- https://s3.amazonaws.com/migivewuwe/kavotedojipexotebejusota.pdfIn PDF document text
- https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0301645712565400ca88/1606288131943/13136394197.pdfIn PDF document text
- https://s3.amazonaws.com/lunojol/the_ideal_gas_law_worksheet_answers_chemistry.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_off0000c135.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC135	4832 bytes
SHA-256: `9f5ee2dc4a28ed1f41b00fa7d96bf123119ce3654ed70b262427792cd5b55e85`
`font_01_sfnt_off0000d1d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1D5	11404 bytes
SHA-256: `2cfb76ae30f0ba947d09be26a04ddb10ebe06593eb2efaea5ae115994dd3feb8`

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