PDF malware analysis — malicious · 3b15b0d8153275fa

MALICIOUS

PDF

63.0 KB Created: 2020-12-16 02:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14

MD5: 023750e7dcbab7c5b52ec7893197686b SHA-1: 3a02dacf192d57b1dcae05b87af95f2c3a99e08f SHA-256: 3b15b0d8153275fa5e609769ff25585ca0a34ae11a659e47bff01ac70acae25b

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, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to academic writing. The presence of an external URI indicates an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=inquiry+to+academic+writing+4th+edition+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4481161/normal_5fa8c9b490443.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388158/normal_5f98a1c828325.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412762/normal_5fac58c334421.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409819/normal_5f9f08bdb58e4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387035/normal_5fb9f2cfdb91a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449614/normal_5f9fcacc755a9.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4464077/normal_5fcdafcba63e8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368954/normal_5f87a4e323fe7.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/7d3ba019-07db-4325-af0f-719ae472797f/sonicare_flexcare_platinum_brush_heads.pdfIn PDF document text
- https://s3.amazonaws.com/nafoxuda/aeon_flux_full_movie_mp4.pdfIn PDF document text
- https://s3.amazonaws.com/dazuxujepov/97261219099.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_off0000b78a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB78A	5704 bytes
SHA-256: `5c3676c4ce675548f151c1361672736e570eecdfc6ac3c260c3bd2ad8bf665d9`
`font_01_sfnt_off0000caf2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAF2	10580 bytes
SHA-256: `3539f8746e2a1c3b974ec40755292f69eb893879eb6e2d8083ed42017051573f`

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