PDF malware analysis — malicious · b6525a74e02e24b8

MALICIOUS

PDF

93.4 KB Created: 2021-01-01 05:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: b53a72ffe8e7bc994e700b2ac22fddab SHA-1: e7d16aec4e0b73e3bf18ff6e671bcde9af7331ad SHA-256: b6525a74e02e24b862a92843d6cd64e6dc4643344ae2768ff6a66465061e1fe4

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malicious content hosting site. The document body appears to be corrupted or obfuscated, preventing a clear understanding of its content, but the presence of the external URI strongly suggests a phishing attempt.

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://trafffe.ru/strik?utm_term=vikings+cast+bjorn+child PDF link annotation
- https://static.s123-cdn-static.com/uploads/4470961/normal_5fe1617f96668.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375705/normal_5fe89abfda02e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453098/normal_5fab942be9135.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368747/normal_5f893258e582c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450730/normal_5fb36a3cf3919.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366028/normal_5f961f64195c1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393625/normal_5f90c862da5bf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422373/normal_5fb28b20ebd3b.pdfIn PDF document text
- https://cdn.sqhk.co/vawikepaf/K6H3jeS/cut_it_out_cutters.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376379/normal_5fa5d7864cc22.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/ebabd175-b2d3-4f77-a010-7a5e40f05c1b/retafajufijanu.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_off0001304c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1304C	5444 bytes
SHA-256: `a75a7b2fd45cb078dc995297b0c8b50ed3e7886a9b67f84a0e21ecf2c665a69f`
`font_01_sfnt_off000142d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142D4	11304 bytes
SHA-256: `87a69454699d579bea9b429685f8ac4c74adbac9fa07e93ae52ac645512d55ce`

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