PDF malware analysis — malicious · 936d5f516c4f5cd3

MALICIOUS

PDF

70.3 KB Created: 2021-02-25 18:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10

MD5: ec153f522a75ba2284db3c986c858c99 SHA-1: 0475335d9e2016962987d33e6afcf410427665a3 SHA-256: 936d5f516c4f5cd3e533eed52ed324eeeccee1eb3f4c1a64aa52cb4371de1d92

136 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://druttle.ru/award?keyword=why+engine+service+soon+light+is+on PDF link annotation
- https://cdn-cms.f-static.net/uploads/4459055/normal_5fd65c37b1642.pdfIn PDF document text
- https://cdn.sqhk.co/xewafazuk/Z2wNTgf/gosada.pdfIn PDF document text
- https://cdn.sqhk.co/xemugugafot/Jjdhjb0/63265340749.pdfIn PDF document text
- https://cdn.sqhk.co/xajegakagiz/ifIjaox/fikomalivifi.pdfIn PDF document text
- https://cdn.sqhk.co/zisujidixa/eAfjjia/48452527336.pdfIn PDF document text
- https://cdn.sqhk.co/zomulusiku/gidFWhc/recette_sandwich_jambon_beurre_emmental.pdfIn PDF document text
- http://nijovilof.iblogger.org/android_17_tournament_of_power_dokkan.pdfIn PDF document text
- http://mufutekuson.getenjoyment.net/32281886630.pdfIn PDF document text
- https://cdn.sqhk.co/folamudoj/p6ZijiZ/pixel_racer_pc.pdfIn PDF document text
- https://cdn.sqhk.co/doginifa/hgiidkZ/idle_tower_defense_wiki.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://totenudiwuwodu.epizy.com/what_are_the_aims_and_principles_of_sustainable_tourism.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d977.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD977	5028 bytes
SHA-256: `801c60f466b53bbd80e0e3607e3105ca66ef8bf94d04148dd93ede1969995231`
`font_01_sfnt_off0000eab1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAB1	9968 bytes
SHA-256: `c973d521df3442bdb990babd5e9f03c79cbdf1dad004823a7c9ddf57ac611142`

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