PDF malware analysis — malicious · 02c02e6a2c86dd79

MALICIOUS

PDF

68.7 KB Created: 2021-09-20 15:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: e90c4a923f3b605698eee63725580c8d SHA-1: 7c838c7c44c918d60e3238f3c6ba3f4f96df1197 SHA-256: 02c02e6a2c86dd797cc0f432a90373ca359987df9c1d7fbfee763db436a10682

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that redirect to various domains, many of which appear to be part of a link farm designed to obscure the ultimate destination. The primary heuristic indicates an external URI pointing to a download page, suggesting the document's purpose is to trick the user into downloading a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

Heuristics 5

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.
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://pistant.ru/uplcv?utm_term=download+free+ringtone+maker+for+android PDF link annotation
- http://detaycopymatbaa.com/userfiles/file/11909404172.pdfIn PDF document text
- http://compsult.net/userfiles/file/xuvakiwomudari.pdfIn PDF document text
- https://pustelnik-budownictwo.pl/ckfinder/userfiles/files/44993586661.pdfIn PDF document text
- http://vagtteam.dk/userfiles/Files/fimazegapusana.pdfIn PDF document text
- http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/1694f410c5562fd8b395d97a08e1e75b/matopegomet.pdfIn PDF document text
- http://valencia.thepokeluau.com/uploads/files/30150450131.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/619bb52435ebb8032fcd6eecdd206dc7/muserat.pdfIn PDF document text
- https://dom4m.com/userfiles/files/dinedared.pdfIn PDF document text
- http://foodzipo.com/uploads/userfiles/files/luligozi.pdfIn PDF document text
- https://listapp.in/ci/userfiles/files/pulati.pdfIn PDF document text
- https://safewatersolutions.in/ckfinder/userfiles/files/29984363857.pdfIn PDF document text
- https://testpensija.bankai.lv/ckfinder/userfiles/files/welajifasekoxisovujepimiz.pdfIn PDF document text
- https://artgallery.devctn.com/ckfinder/userfiles/files/ritumopagejetozewomezedob.pdfIn PDF document text
- http://beijingxinzhi.com/userfiles/file/20210901052306_2125871976.pdfIn PDF document text
- http://china-engine.net/ckfinder/userfiles/files/61152134912.pdfIn PDF document text
- http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/11484206720.pdfIn PDF document text
- https://pfhotel.gr/ckfinder/userfiles/files/6151995078.pdfIn PDF document text
- http://xedaptap.net/userfiles/file/38554821482.pdfIn PDF document text
- http://ettorebelfioreliutaio.it/userfiles/files/49056142122.pdfIn PDF document text
- http://scuderieverdina.it/scuderia/userfiles/file/65258827681.pdfIn PDF document text
- http://phutungvespaco.com/luutru/files/rabozuviwepavavesajusoz.pdfIn PDF document text
- https://clumba-indoor.ru/files/files/28358230253.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b01e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB01E	14512 bytes
SHA-256: `5d7d6a12fce698e3bd38fb44219bb6a158d0c968567b3514db71d7d423903dbe`
`font_01_sfnt_off0000d451.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD451	10708 bytes
SHA-256: `faecf593dd5c746bcdf02af6bb07beb24a296b897a46d93b7e41f2a37d3698de`
`font_02_sfnt_off0000ecb2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECB2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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