PDF malware analysis — malicious · bc2f63d3cf3d8363

MALICIOUS

PDF

70.3 KB Created: 2020-12-27 11:48:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 09c01064f2b7c8d15fb425ca05f93447 SHA-1: 740468761f3fb29d52a10533d31802a50d9b7f2e SHA-256: bc2f63d3cf3d836378eb0edb7de6c5152aa02070a091373a318b1f0736cbb8f5

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafffi.ru', which is likely part of a phishing lure disguised as a user manual. The PDF structure itself contains suspicious elements, including duplicate object definitions, indicating potential obfuscation or malicious intent.

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://trafffi.ru/123?utm_term=sq8+mini+dv.+manuale+d%2527uso PDF link annotation
- https://cdn-cms.f-static.net/uploads/4413004/normal_5fa8ba3c589ab.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4412996/normal_5fc5e837e8718.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4499341/normal_5fca35dd94f11.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387919/normal_5fd28658c8c60.pdfIn PDF document text
- https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/d1ee3c84.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451927/normal_5fa7e8b5523c4.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/71f6cc29-d6ed-4f6c-8b67-0d7d1b00db55/parek.pdfIn PDF document text
- https://s3.amazonaws.com/jevelel/variedades_de_milho_produzidas_em_mocambique.pdfIn PDF document text
- https://s3.amazonaws.com/sedowedi/chrome_plugin_complete_website.pdfIn PDF document text
- https://s3.amazonaws.com/mubefula/ipc_360_camera_app_windows.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5b8be101-acf3-4a99-b133-0e1785edcf3d/android_studio_ubuntu_kvm_permission.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_off0000d621.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD621	5424 bytes
SHA-256: `78480343c7badb09c8c410c519e4d7bece68ba991fa8156709b0bcab53af3cae`
`font_01_sfnt_off0000e891.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE891	10548 bytes
SHA-256: `f409728ea25e546b77ed7b3ac1ee148df951dedc847d1ac1e9f8f5987e1f3048`

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