PDF malware analysis — malicious · d49edd0d48fd41c1

MALICIOUS

PDF

78.2 KB Created: 2021-04-26 19:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 9e11074f9eef59479de47a1a332ab8c8 SHA-1: e79a42764fbc6ef2c17726716aac627b0ce6555d SHA-256: d49edd0d48fd41c12f8caae4c605e8d80c60cbeecac26e23d246398d6368b846

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary malicious URL identified is https://mezovuduw.ru/strik, which is likely used to serve a second-stage payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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.
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://mezovuduw.ru/strik?utm_term=what+is+a+jetpack+mobile+hotspot PDF link annotation
- http://woxijakuzadajew.getenjoyment.net/98532138199.pdfIn PDF document text
- http://gudelew.mywebcommunity.org/james_baldwin_biography_timeline.pdfIn PDF document text
- http://fejiximodanu.mygamesonline.org/bbc_compacta_class_11_english_answers.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470543/normal_5fd619b59c3f7.pdfIn PDF document text
- http://wivaserana.mywebcommunity.org/11684798892.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4388165/normal_5fe000b34d561.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_09e3b09f7dbc4aed94a43bba9a21244a.pdf?index=trueIn PDF document text
- http://lugifer.onlinewebshop.net/46462168244.pdfIn PDF document text
- https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_ed8d620daafa47e5b1f199cf4a6507b6.pdf?index=trueIn PDF document text
- https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_87f9784112c349ff8b59d29fed7d75f8.pdf?index=trueIn PDF document text
- https://eec7825b-737a-4a76-8d7e-71a5c2c41e0e.filesusr.com/ugd/9b2d9b_b402bd16f03248cb8da9ee6a3b279b92.pdf?index=trueIn PDF document text
- https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_6cc1f249fe42466a900f4767928dc6c9.pdf?index=trueIn PDF document text
- https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_dce13553442747008194a54d38978805.pdf?index=trueIn PDF document text
- https://16dc6c2a-32e3-4a69-9eea-5b59d93654f8.filesusr.com/ugd/176c29_e3382ee17b5c418e95587c3003e24c2f.pdf?index=trueIn PDF document text
- https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_d5a548446fa846f0a7491b7506ba5c6d.pdf?index=trueIn PDF document text
- http://telifujovemevo.atwebpages.com/probability_exam_questions_and_answers.pdfIn PDF document text
- http://panexorumilogim.myartsonline.com/orden_caprimulgiformes.pdfIn PDF document text
- http://pijosufun.myartsonline.com/dukuxibedanufefujusubune.pdfIn PDF document text
- https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_aa259886c6b348f08a54c97667400007.pdf?index=trueIn 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_off0000f363.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF363	5372 bytes
SHA-256: `ca0b271b661dab7c7d1b5629142a6fa6b2baff39652efe1fe9151de2f8562696`
`font_01_sfnt_off00010592.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10592	11152 bytes
SHA-256: `a09ca39a51c01af9a1baaf1519b83fd1c707f75f759aaba4bfbb5c2ec357a36e`

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