PDF malware analysis — malicious · fac8a1ca87149009

MALICIOUS

PDF

80.2 KB Created: 2021-02-11 16:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03

MD5: 0c1a53129a86e533e8e5d1f887f0d00d SHA-1: 7d3d83b6e9de6645f2c85313c0c8d2fd17393e20 SHA-256: fac8a1ca8714900954bd9291deefb30d7250fbd2e189ac9475dba1b6a402c312

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'druttle.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://druttle.ru/123?utm_term=total+gym+1900 PDF link annotation
- https://static.s123-cdn-static.com/uploads/4489988/normal_5fc6286929243.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4458616/normal_5ff7fe8bdd360.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462038/normal_5fd34d6ad284a.pdfIn PDF document text
- http://vobigabifinu.22web.org/kiruk.pdfIn PDF document text
- http://losqutoq.online/71409122255tevpa.pdfIn PDF document text
- http://lnstagramverificationbadge.com/melhor_de_skank_downloadywvsq.pdfIn PDF document text
- http://detonic-ordina.website/73997581758s94ow.pdfIn PDF document text
- http://armada.technology/17259048048c7lij.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379363/normal_5ff122f233295.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4376088/normal_6000bdd0c03c0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466366/normal_60238b3407997.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://mixomexazuvoxod.rf.gd/pvc_glue_msds_sheet.pdfIn PDF document text
- http://mugoxox.epizy.com/42487356822.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_off0000fd92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD92	5132 bytes
SHA-256: `98083117dcc5df4eb035d0f14678dea2c906b22f9f0b13417c403dc0c3ecadc4`
`font_01_sfnt_off00010f0f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F0F	10908 bytes
SHA-256: `4a335db3058e204bdb65ad9e44b0182c5706d942365cbebb355e4e9c4cb52b52`

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