PDF malware analysis — malicious · 158686cb8c60deaf

MALICIOUS

PDF

48.5 KB Created: 2020-10-15 00:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: 587e64379e0dfb2d93611c10eb61efbb SHA-1: 273ed303653f636b206dd2d9680fb6951735bc6f SHA-256: 158686cb8c60deafcb762335b092b959fe582fbb3ff7effd7044c74547f7796f

184 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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://ggtraff.ru/strik?keyword=pomodoro+technique+illustrated+pdf+download In PDF document text
- https://cdn-cms.f-static.net/uploads/4366952/normal_5f872c50bd20d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365552/normal_5f86f9d3d277c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366018/normal_5f8711651da4c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367311/normal_5f87642c73132.pdfIn PDF document text
- https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/gevoderovepiru.pdfIn PDF document text
- https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1392291.pdfIn PDF document text
- https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/4041939.pdfIn PDF document text
- https://fixabugodorev.weebly.com/uploads/1/3/1/8/131856934/nulet-vumilevibiwun-totagini.pdfIn PDF document text
- https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/ginanopozazuvoxi.pdfIn PDF document text
- https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/pupapefujeg.pdfIn PDF document text
- https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
- https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/poxazudej.pdfIn PDF document text
- https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/jatelu-zukolugaw.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367277/normal_5f876c22ef369.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366395/normal_5f875760ce53f.pdfIn PDF document text
- https://site-1038519.mozfiles.com/files/1038519/dunexosu.pdfIn PDF document text
- https://site-1044164.mozfiles.com/files/1044164/22979437947.pdfIn PDF document text
- https://site-1038927.mozfiles.com/files/1038927/9299971362.pdfIn PDF document text
- https://site-1038472.mozfiles.com/files/1038472/80590198659.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365642/normal_5f87681276e92.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366369/normal_5f8767497d61e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367310/normal_5f874bfd7371c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365602/normal_5f8769565045a.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006698.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6698	7068 bytes
SHA-256: `0f39df7c8b2296d6979aa586662745f3299efbbf408a3aa0d96902dcb918df38`
`font_01_sfnt_off00007eef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7EEF	5616 bytes
SHA-256: `31c1cc4af426183f8f20da7e9db3889eb2deaf239cac86ab63302f29cd9e018d`
`font_02_sfnt_off000091f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x91F4	9936 bytes
SHA-256: `fdd584977c3b74e65a5cd7b09f737355c80efeba1155f5f38097b5c1c7d05227`

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