PDF malware analysis — malicious · e6fd9c7db9ccfc48

MALICIOUS

PDF

67.3 KB Created: 2020-10-16 20:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25

MD5: b51cf81423714b585ae6c8cf239ef219 SHA-1: 958482df883b175605c70ad6b823fa2f669a2745 SHA-256: e6fd9c7db9ccfc482a83ad8679a9c255111a8f9d85f7680efaa6dd19eb6f70d4

184 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://cctraff.ru/strik?keyword=nagagutsu+wo+haita+neko In PDF document text
- https://cdn-cms.f-static.net/uploads/4370746/normal_5f8914829fe47.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370542/normal_5f880ce3714ef.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365606/normal_5f875cf881af8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365621/normal_5f893a6be092e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368226/normal_5f88526fa302b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367302/normal_5f8743f4d8425.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366646/normal_5f87c8ab7ccb0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369506/normal_5f8886a783375.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366339/normal_5f8760d29196a.pdfIn PDF document text
- https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/koduka-manunadiwebawof.pdfIn PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7775416.pdfIn PDF document text
- https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/4243524.pdfIn PDF document text
- https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/luloxanibi.pdfIn PDF document text
- https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/64eac.pdfIn PDF document text
- https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/newowub-jizerufelaz.pdfIn PDF document text
- https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/662261.pdfIn PDF document text
- https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/7d0b70af1a124.pdfIn PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3029889.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/3a2ae936-e958-469c-be61-d2715763e08e/visob.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/69b928fc-fb72-422f-9ceb-23ac551e01d6/jiwojame.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3b6c319e-1b76-47c1-9c1c-65790067263b/40151518063.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eb6bd815-acaa-4147-ad52-a4f85e149659/jelulegiza.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/8330/8442/files/89891146085.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/8440/7199/files/ff9_moguri_mod_steam.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/4480/6042/files/60610281451.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_off0000813a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x813A	22144 bytes
SHA-256: `420aae32fe5280c055c061e1cfd3ed9a07d2ccab2f8069557f0c936ce343a0e0`
`font_01_sfnt_off0000c79e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC79E	4944 bytes
SHA-256: `2ce3f512031b5e2a0cf834d38356196fdfc4345dedfe8e4d2307c432a5eca006`
`font_02_sfnt_off0000d888.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD888	11348 bytes
SHA-256: `941c15b8bcc86796709545e6783bcd45976c552e1f5ddd63cda61a312a2a0e49`

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