PDF malware analysis — malicious · ec29f314c9ea5471

MALICIOUS

PDF

49.9 KB Created: 2020-11-09 05:19:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15

MD5: b63dc8cde71b72f2d81745bfb993aa96 SHA-1: 2ea6168448c006185cfc3c69183d83c6fc3ed33d SHA-256: ec29f314c9ea547132aaee32c32bf2b5d764597afef6b8cacac583042a16987d

136 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

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.
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://traffset.ru/123?keyword=katonah+metro+north+parking PDF link annotation
- https://cdn-cms.f-static.net/uploads/4368731/normal_5f8854cee9559.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416512/normal_5f9b44b253d5e.pdfIn PDF document text
- https://direfuxapiw.weebly.com/uploads/1/3/4/3/134371974/8334128.pdfIn PDF document text
- https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/500af5f9e.pdfIn PDF document text
- https://zojajodasu.weebly.com/uploads/1/3/4/3/134354616/5174012.pdfIn PDF document text
- https://renefifukidib.weebly.com/uploads/1/3/4/3/134343870/9781682.pdfIn PDF document text
- https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/9970137.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/34b7154f-d4d1-4168-bf56-6e06a6720fe5/42036610049.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_off00007c43.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C43	5056 bytes
SHA-256: `5b15f017e4defedf2d1fac509e282e8eb1ec066acb0ff657cf2e314965421546`
`font_01_sfnt_off00008d4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D4B	13656 bytes
SHA-256: `e22b62f71e9c12d3fae40b6402243018ee463aa28f374da72303b62757dcd946`

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