PDF malware analysis — malicious · d520a50b30662d51

MALICIOUS

PDF

35.1 KB Created: 2020-10-03 14:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10

MD5: 2bc2190f4f58f4a7eee522c76b407e21 SHA-1: 6a81c4a0084d4fe5afabb8fd4da36e9bc8a2db6f SHA-256: d520a50b30662d5120d197c3a85b86d91efc9ba09414332a3ffb810dba0180ce

124 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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 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=fundamental+accounting+principles+23rd+edition+chapter+10+answers In PDF document text
- http://files.cameronnazarene.org/uploads/1/3/1/8/131871871/vegemigaguwiwez.pdfIn PDF document text
- http://files.skateestateonline.com/uploads/1/3/0/7/130776485/5771505.pdfIn PDF document text
- http://xarufibo.unlcafa.com/uploads/1/3/2/8/132814097/sulirizopu.pdfIn PDF document text
- http://limodeg.mdiaccess.com/uploads/1/3/0/7/130775379/rikido.pdfIn PDF document text
- https://site-1037009.mozfiles.com/files/1037009/baduxasugelarimapex.pdfIn PDF document text
- https://site-1036760.mozfiles.com/files/1036760/juwufasitisopumepafuvata.pdfIn PDF document text
- https://site-1036973.mozfiles.com/files/1036973/vedojetasapemug.pdfIn PDF document text
- https://site-1039547.mozfiles.com/files/1039547/7730847081.pdfIn PDF document text
- https://site-1036684.mozfiles.com/files/1036684/88211209700.pdfIn PDF document text
- https://site-1038520.mozfiles.com/files/1038520/lipek.pdfIn PDF document text
- https://site-1040215.mozfiles.com/files/1040215/rosorevumezew.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/48c703e9-823f-4d99-80dc-e87a14012b33/86827524164.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0c83ba97-7bc5-4828-a567-0c71130361be/1512322627.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4daef8cc-b9ec-4be0-89e2-5fbd1f1f1cc8/10003171389.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/97f40c5b-5cfe-409d-8bb4-dfd4a126f28a/nuregogiwesumozuzul.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_off00004aac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4AAC	6024 bytes
SHA-256: `3e257c3f2eecdd63371516391564183bf983fedbde53a90c9c91faf83c1aaee3`
`font_01_sfnt_off00005f1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F1C	9400 bytes
SHA-256: `46e673c1fa84250cdea483cc9b684d6b439c7395eb40f628c9b44b20ec284ad2`

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