PDF malware analysis — malicious · d1271dd7b0c6c2ad

MALICIOUS

PDF

100.2 KB Created: 2021-04-10 05:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02

MD5: 7f24b85ef21fc752631028d052711ff5 SHA-1: e910df49a22101a693352deffa944c5630a0d400 SHA-256: d1271dd7b0c6c2ad0856bbf0bf8d37a88c8ab0e88a7db26327df8ec321892d78

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic further support this, indicating the document's purpose is to trick the user into clicking a link that leads to a malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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/strik?utm_term=what+were+results+of+the+bantu+migrations+%2528think+about+cultural+diffusion%2529 PDF link annotation
- https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/ketepute.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366312/normal_605075e17ff25.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4448719/normal_5fcb24109727e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4443576/normal_5ffeba716a52f.pdfIn PDF document text
- https://mozeduxazos.weebly.com/uploads/1/3/4/0/134018133/jikazaxadizefebafu.pdfIn PDF document text
- https://xosebabonewita.weebly.com/uploads/1/3/4/6/134613761/cb7f8181dccab.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446287/normal_5fcb8ea64a704.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4385412/normal_5fe292505a027.pdfIn PDF document text
- https://puwijupuf.weebly.com/uploads/1/3/4/7/134701632/8308700.pdfIn PDF document text
- https://gexumuvebevo.weebly.com/uploads/1/3/4/3/134312536/rodolinu.pdfIn PDF document text
- https://xefomivor.weebly.com/uploads/1/3/0/8/130814633/fodesuf.pdfIn PDF document text
- http://piwubexugapi.22web.org/gudebarolukeda.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413843/normal_600a07c357aa0.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://pedijuwugeta.rf.gd/buzebelinaguziribeta.pdfIn PDF document text
- https://s3.amazonaws.com/saxefi/tegikapovoga.pdfIn PDF document text
- https://s3.amazonaws.com/vuzotisenixava/autocad_2014_with_crack_utorrent.pdfIn PDF document text
- http://zovavabiw.epizy.com/resttemplate_interceptor_not_working.pdfIn PDF document text
- http://bopamebedozupux.epizy.com/profit_and_loss_templates_for_small_business.pdfIn PDF document text
- https://s3.amazonaws.com/gopuze/26873758796.pdfIn PDF document text
- http://pigepitusedotet.rf.gd/posijulaka.pdfIn PDF document text
- https://s3.amazonaws.com/timeziso/lagu_andien_gemintang.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000137a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137A0	5780 bytes
SHA-256: `2b887a5a655991c84484c7a9a4825338b18e5c4237f424b94c07f34fff8f0db4`
`font_01_sfnt_off00014b46.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14B46	12016 bytes
SHA-256: `a3dd7d66c622f46ac31aa4ecb67576f092ff989807c81f24ab75f3e1871bced7`
`font_02_sfnt_off00017471.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17471	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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