PDF malware analysis — malicious · 57266518f9307bd5

MALICIOUS

PDF

70.3 KB Created: 2021-02-24 11:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10

MD5: e38c60adf51ae7d8d6d78bd7af98e307 SHA-1: 47486ebd8bd259384108d06209ef46bfe07e3c32 SHA-256: 57266518f9307bd55c64e51abc27c0a59240d407d2d541607bba9e179230309f

136 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/wix?keyword=special+senses+worksheet+pdf PDF link annotation
- https://cdn.sqhk.co/wezufunin/nijhjbg/basement_hopper_window_replacement.pdfIn PDF document text
- https://cdn.sqhk.co/pasojixaju/ijgfxSL/nimojoxer.pdfIn PDF document text
- https://cdn.sqhk.co/dutimapo/gdeCggk/mapalipe.pdfIn PDF document text
- https://nametipij.weebly.com/uploads/1/3/1/1/131164318/zaruwuzomofawile.pdfIn PDF document text
- https://cdn.sqhk.co/dixufeja/iaRgcgj/fut_20_squad_creator.pdfIn PDF document text
- https://cdn.sqhk.co/woferomot/s2hckjf/xitukibebeguzovev.pdfIn PDF document text
- https://vamemaxodoj.weebly.com/uploads/1/3/1/4/131437173/lexazevuwuniguvu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4493867/normal_5fe2780db176c.pdfIn PDF document text
- https://cdn.sqhk.co/dutebosatu/CGjhhaT/tebexoxumabebalikatib.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/vufupu/40462616280.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_off0000d664.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD664	5500 bytes
SHA-256: `09c4be1e3b848475c814b6d2fb0e5445a1774c8095bb48f0802b2d2513c15eb9`
`font_01_sfnt_off0000e923.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE923	10532 bytes
SHA-256: `fa64f906052c960068d4592ad6f5ef736e87dd606a8ad6bc0b90528fc48604ac`

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