PDF malware analysis — malicious · ea9e1a8da8e48328

MALICIOUS

PDF

75.0 KB Created: 2021-02-24 20:14:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 9db6f8818d142569cd9a58ee5ffbe5e9 SHA-1: 05e83dc1333ac759338f0bf94cc5cf3679af4e39 SHA-256: ea9e1a8da8e48328f7b7b8161f2b1864817d9b8b0ecf190dfac763561fda9781

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, indicating it functions as a link farm designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs and the PDF's structure point towards a tactic of overwhelming search engines with content, while simultaneously directing users to potentially harmful sites.

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://crophysi.ru/wix?keyword=triple+p+intervention PDF link annotation
- https://vedaputenada.weebly.com/uploads/1/3/5/3/135318287/e2b60880ee1a7e5.pdfIn PDF document text
- https://ravikuzisuwu.weebly.com/uploads/1/3/4/4/134470025/zotezune_wetozod_bagovipes.pdfIn PDF document text
- https://wetusaseri.weebly.com/uploads/1/3/5/2/135297966/0a5491486ea9.pdfIn PDF document text
- https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/1fd7c2176.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4487186/normal_5ffda35ce47f4.pdfIn PDF document text
- https://rejasujewefem.weebly.com/uploads/1/3/0/7/130738882/muzoritujorijeka.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4462694/normal_5feddb5701f8b.pdfIn PDF document text
- http://sevagawos.getenjoyment.net/jibebikupetazakazuko.pdfIn PDF document text
- http://xazufajemexeb.22web.org/tea_tv_app_free.pdfIn PDF document text
- http://numulul.mygamesonline.org/wukakekemuxabomo.pdfIn PDF document text
- https://kevibudoja.weebly.com/uploads/1/3/0/8/130814666/6600909.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4401697/normal_600d0c7b089c8.pdfIn PDF document text
- https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/xevusedep.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://sabiwilurase.atwebpages.com/html_css_js_learn.pdfIn PDF document text
- https://s3.amazonaws.com/rezugekolaba/pezinizorabimutog.pdfIn PDF document text
- https://s3.amazonaws.com/wixanarer/bulleya_sultan_ringtone_pagalworld.pdfIn PDF document text
- http://kepagewav.atwebpages.com/guxexitesekelakekewazomej.pdfIn PDF document text
- http://xolavozezimodan.onlinewebshop.net/watchman_nee_books_collection.pdfIn PDF document text
- http://pasivete.epizy.com/devastating_news_reports.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dd14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD14	4224 bytes
SHA-256: `cdc1dea458b95f3930ab365a85f170f8590e8fe9ad3848ceceac5d8d9eba4341`
`font_01_sfnt_off0000eb6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB6B	11520 bytes
SHA-256: `1335b4d4558bfb02649e6ecfe1894d788d489727aa90f8b06f2e8f9b7b700646`
`font_02_sfnt_off000110f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110F6	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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