PDF malware analysis — malicious · dddf3062745c7a94

MALICIOUS

PDF

69.6 KB Created: 2021-09-26 21:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 3e0feb5074b6b524e86da112d3ef87b7 SHA-1: 9a4a8eed88f3d40f03c14bcabc6bbe55335d33a8 SHA-256: dddf3062745c7a94c2895a2002570abd1e1c106e1c1c70f0b763b73a7ef1d4dc

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting and are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware or engaging in phishing. The embedded JavaScript is likely responsible for initiating the download or redirect process.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://ketchas.ru/uplcv?utm_term=tekken+4+game+download+for+android+apk PDF link annotation
- https://shellserva.nl/docs/Image/file/50374998615.pdfIn PDF document text
- http://ndfeef.com/radiant/mechimobiles/userfiles/files/77664801864.pdfIn PDF document text
- https://marbeyoyun.com/calisma2/files/uploads/xotedijamisobisumogof.pdfIn PDF document text
- http://mc-opony.pl/files/file/35972958690.pdfIn PDF document text
- https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/wapawekejuxawikawepuvapi.pdfIn PDF document text
- http://fongyoskert.hu/userfiles/files/wufukagudezujurasinepe.pdfIn PDF document text
- https://atrax.hr/files/tativedopometubeginaka.pdfIn PDF document text
- http://hotelniagararimini.eu/userfiles/files/gomoworawawagiretizupuv.pdfIn PDF document text
- https://semineebrasov.ro/printuri-fi/files/vovuxinuxigosonujodapufe.pdfIn PDF document text
- http://bawaconstructions.com/editorData/file/wenudowiselef.pdfIn PDF document text
- http://riviera.az/userfiles/file/fadugire.pdfIn PDF document text
- http://paillasse.hu/userfiles/file/72959786569.pdfIn PDF document text
- http://serextion2006.com/js/upload/files/sulokuje.pdfIn PDF document text
- https://www.auto-ecole-acm.com/ckfinder/userfiles/files/tafawobigizikuzenala.pdfIn PDF document text
- http://twtime.com/uploads/files/202109020318414367.pdfIn PDF document text
- https://maychieuvinh.vn/upload/files/45123815259.pdfIn PDF document text
- https://seeandhearbetter.ie/img/shop/contents/30197210785.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d27fa54178---21056202472.pdfIn PDF document text
- https://rireenfrance.com/images/upload/files/vodelifufewuvuk.pdfIn PDF document text
- http://clearspace-design.com/CKEdit/upload/files/vijexilaxejawipemafosaros.pdfIn PDF document text
- http://theheavent.com/userfiles/files/miwanitifijiwof.pdfIn PDF document text
- http://say-international.eu/userfiles/file/robesovipuwonuziz.pdfIn PDF document text
- http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134afa881f2a---33887138954.pdfIn PDF document text
- http://unternehmensberatung-hegenbarth.de/userfiles/file/vewelitijanojoduni.pdfIn PDF document text
- https://easyown.ddproperty.com/datas/files/podoxog.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_off0000b3b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB3B1	14464 bytes
SHA-256: `6a5f81c882d479b37670a05bb9771dcf732a456b40db36786bf6f268e4be1194`
`font_01_sfnt_off0000d7c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7C3	10796 bytes
SHA-256: `302345cb3e1f5185f6a54aef77c2fd0d6ac15c26a3e0a19a5098447eccd4833a`
`font_02_sfnt_off0000f076.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF076	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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