PDF malware analysis — malicious · eafef6f5a3ada3b8

MALICIOUS

PDF

70.8 KB Created: 2021-09-25 05:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 656f50c5f2aa75da7f242e29151c25c3 SHA-1: beae47d1efae8748978ff0dab7e6c33a423a51be SHA-256: eafef6f5a3ada3b801a4350788bf9aaa770fda2464f2b6e37355911deb4d776b

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a link farm strategy, often used for phishing or distributing further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://amgaa.org/temp/files/fakoxorukezigo.pdf In PDF document text
- http://cascinamana.it/userfiles/file/74527977209.pdfIn PDF document text
- https://chowdhurytourism.com/ckfinder/userfiles/files/gijitukuguwuv.pdfIn PDF document text
- https://bselink.com/userfiles/file/48877040779.pdfIn PDF document text
- http://canhtoanland.com/upload/files/93071275345.pdfIn PDF document text
- http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/d3517e0eb6c9e4d7622a5f52275cedc4/nuwebefubiwoz.pdfIn PDF document text
- http://gaishachuukobuhin.com/js/upload/files/60981384088.pdfIn PDF document text
- http://celeb.huh.hu/UserFiles/File/96263112650.pdfIn PDF document text
- http://slhospital.com/upload/fckeditor/file/21877964390.pdfIn PDF document text
- http://kadh.kr/bobod/upload/file/77526498065.pdfIn PDF document text
- https://umiyawoodworks.com/fckdb/userfiles/file/96161255224.pdfIn PDF document text
- https://castel.ro/userfiles/file/fopijakumevutipejikila.pdfIn PDF document text
- http://azseal.net/uploads/userfiles/file/28536028190.pdfIn PDF document text
- https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/50359589606.pdfIn PDF document text
- https://dukupahit.com/contents/files/55568434045.pdfIn PDF document text
- http://teen.plovdivweek.com/js/ckfinder/userfiles/files/36375472770.pdfIn PDF document text
- https://dukra.sk/editor_uploads/files/jalixinesemobikasudate.pdfIn PDF document text
- http://trunglamdecor.com/uploads/userfiles/file/didasufixumafanupuju.pdfIn PDF document text
- http://southerncross-ex.com/images/blog/file/16472612771.pdfIn PDF document text
- https://civilkontroll.hu/uploads/file/44620629612.pdfIn PDF document text
- http://chiaranannini.com/userfiles/files/29718689764.pdfIn PDF document text
- https://limadelimon.com/images/file/57338794668.pdfIn PDF document text
- http://zgkimsteszew.pl/img/upload/files/85544198219.pdfIn PDF document text
- http://bakefruit.com/uploads/files/202109060137415302.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=vidometer+for+androidPDF link annotation
- 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_off0000b0c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB0C6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c8dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8DD	10268 bytes
SHA-256: `62ed10eb813469f34ae5590b065cdf2d4c201e55fc27d5fed4ffdd3f24f195bd`
`font_02_sfnt_off0000dfea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFEA	17824 bytes
SHA-256: `bb6d9fb044990f2645222906831a8b7f36d7fb153319760c70519d6f9b02a2e4`

Open this report in the interactive analyzer, or submit your own file for analysis.