PDF malware analysis — malicious · b8292293f4b71cc2

MALICIOUS

PDF

72.6 KB Created: 2021-09-28 18:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: f0633fa9ce1478a3ff19abdaba5bc90e SHA-1: 1517d277d86690f949e0d9c815e97938db8a8a2f SHA-256: b8292293f4b71cc22168e94d442ca090a3df7435eadaf41ad614891e92260950

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and the ML_NYX_PDF_MALICIOUS classification strongly suggest malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or download of a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://irlanc.ru/uplcv?utm_term=download+stickman+rope+hero+2+mod+apk PDF link annotation
- http://spartaksedlec.cz/spartaksedlec/userfiles/file/zokojubosutel.pdfIn PDF document text
- http://hwayinn.com/image/files/20210923_192215.pdfIn PDF document text
- https://xeroxexpres.cz/userfiles/file/jirid.pdfIn PDF document text
- http://phongkhamthienhoa.org/images/files/jusatovoxuwa.pdfIn PDF document text
- https://holcom-wd.com/webroot/img/files/sixuvupagijegaforonu.pdfIn PDF document text
- http://gzperson.com/uploadfile/files/2921324125.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/cm1a6bbokber01k0u8venbgnju/dakajiz.pdfIn PDF document text
- http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fobumoveriw.pdfIn PDF document text
- http://wwpokebar.com/uploads/files/29592302288.pdfIn PDF document text
- https://dennismaloney.ca/upload/editor/file/vujunojirizavesowume.pdfIn PDF document text
- https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/1a558924fb774c556610e215eb3861a0/79843649207.pdfIn PDF document text
- https://oxfordjsr.com/userfiles/file/71377382523.pdfIn PDF document text
- http://ticaproduce.com/ckfinder/userfiles/files/laxulaxexifanixurabof.pdfIn PDF document text
- http://codienlanhtrangia.com/Images_upload/files/87451310539.pdfIn PDF document text
- http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lupofigalutemijaja.pdfIn PDF document text
- http://aiswaryamatrimonials.com/fck_uploads/file/zamosopu.pdfIn PDF document text
- http://pathtojanna.com/userfiles/files/wibirolinolowimabeno.pdfIn PDF document text
- http://www.civilhospitalpalampur.in/img/uploads/files/26859880349.pdfIn PDF document text
- http://biolabsrl.org/userfiles/files/zajelimapobo.pdfIn PDF document text
- http://vigen12.com/userfiles/file/67735318619.pdfIn PDF document text
- http://saraya-shop.ru/upload/files/zinekovege.pdfIn PDF document text
- https://scavilecis.it/userfiles/file/79253949198.pdfIn PDF document text
- http://idolyokocho.com/js/ckfinder/userfiles/files/77938934439.pdfIn PDF document text
- http://sinosteelcode.com/filespath/files/20210921001451.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_off0000b571.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB571	11080 bytes
SHA-256: `68951c68e6db20f467d71c235094161b752be3c838c51df93b998e98d7a47ef8`
`font_01_sfnt_off0000cf29.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF29	17748 bytes
SHA-256: `038a6c46b7cfd8ffe9bb5980b48cd1461ab6702717fb385d46452f47b8b2a389`
`font_02_sfnt_off0000fc74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC74	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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