PDF malware analysis — malicious · aa6acb9e6b5dcdcb

MALICIOUS

PDF

72.2 KB Created: 2021-02-21 14:24:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07

MD5: c11d7fb3006f2089b129fee4cda75f57 SHA-1: d62423b7e1685b3a2281d97d6705a3bab01f356c SHA-256: aa6acb9e6b5dcdcb83d5c4de8b63050b9f49e8aaf1256104247e5787c252bce5

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, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'bologen.ru', which is likely used to host a malicious payload or phishing content. The PDF structure and embedded content suggest an attempt to trick the user into visiting this external resource.

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://bologen.ru/strik?utm_term=introduction+to+analysis+of+algorithms+cornell PDF link annotation
- https://static.s123-cdn-static.com/uploads/4408333/normal_5fe028713571c.pdfIn PDF document text
- http://ru-order-687646765445.art/cyber_law_pptwr4r8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481406/normal_6021a6f2f0381.pdfIn PDF document text
- http://eroganoficial.site/587212185367oyq8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392666/normal_603135c49ad15.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470532/normal_600e5b73cad4f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485578/normal_60192f31478b2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488330/normal_5fd9304f6f687.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/kakekojezutok/what_color_are_hazel_eyes_yahoo_answers.pdfIn PDF document text
- https://s3.amazonaws.com/busutafitufe/jekegi.pdfIn PDF document text
- https://s3.amazonaws.com/taguxif/77629143474.pdfIn PDF document text
- https://s3.amazonaws.com/jedobufudajewu/extremely_difficult_trivia_questions_and_answers.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_off0000dbdf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBDF	5472 bytes
SHA-256: `721649dff7f47875c274a0136286b1e424434fb90d2877c85de11763d0b70a1e`
`font_01_sfnt_off0000ee5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE5D	10876 bytes
SHA-256: `28d3d58212f2d2d2145298732c997367f1615bb3dd4798dfedf251a89d899e3d`

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