PDF malware analysis — malicious · 52014695354811ef

MALICIOUS

PDF

35.9 KB Created: 2020-11-07 03:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23

MD5: 09c91a6aa721796fcd409b39f3f90544 SHA-1: 76696e886cf653a2b651414c04b0e645cbd3dcc1 SHA-256: 52014695354811eff2bf617bcd365e294ad07daed75d88c124b5954e72b02339

126 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
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://trafftec.ru/123?keyword=nyu+shuttle+route+b PDF link annotation
- https://cdn-cms.f-static.net/uploads/4420476/normal_5fa57d13e03c7.pdfIn PDF document text
- https://rawebitor.weebly.com/uploads/1/3/4/3/134337567/2005028.pdfIn PDF document text
- https://febixitojujemo.weebly.com/uploads/1/3/4/4/134402622/zifaruxak.pdfIn PDF document text
- https://jenititufevi.weebly.com/uploads/1/3/4/5/134595561/tewomav.pdfIn PDF document text
- https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdfIn PDF document text
- https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/kiwed.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421471/normal_5fa4401c4405b.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://sirilab.files.wordpress.com/2020/11/85425378100.pdfIn PDF document text
- https://s3.amazonaws.com/domegagowevag/funeral_planning_guide.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_off00004f7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4F7D	4776 bytes
SHA-256: `f03ee694dde21882bf1cd1b36779a11b5cd0b5a2589f8a3339069bf2d02ea231`
`font_01_sfnt_off00005fc2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FC2	10480 bytes
SHA-256: `693ba441d5c2fec0f6782dbe57aa7780d47bab8917922ecd1468f2aab15e7d8c`

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