PDF malware analysis — malicious · 2f087242d486c096

MALICIOUS

PDF

40.7 KB Created: 2020-11-05 21:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02

MD5: f40f916bb46dcb455f36765dd8ab4cbf SHA-1: d3e5102786da51cfd81aea7c531a49d36e2a3f1a SHA-256: 2f087242d486c09693e8191a4ca406a1eba37a0a0257acf74b6f25691b8599ec

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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://traffnew.ru/strik?keyword=how+to+make+a+skimmer PDF link annotation
- https://cdn-cms.f-static.net/uploads/4372987/normal_5f8af9d8c2855.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365656/normal_5f8d9519a5d5b.pdfIn PDF document text
- https://rezivunafotete.weebly.com/uploads/1/3/4/3/134354631/mewadekelawoz-rozip-zenedejabezete.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371514/normal_5f895c3a92ce3.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/mejigavukolu/2016_subaru_outback_3.6r_owners_manual.pdfIn PDF document text
- https://s3.amazonaws.com/pevuwarobuvowa/27037542550.pdfIn PDF document text
- https://s3.amazonaws.com/pisedij/49797893826.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/6868/5464/files/posuluwig.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/6695/6707/files/woximi.pdfIn PDF document text
- https://s3.amazonaws.com/vukumesoj/xemogiju.pdfIn PDF document text
- https://s3.amazonaws.com/wilugugo/caucasian_chalk_circle_guide_book.pdfIn PDF document text
- https://s3.amazonaws.com/memul/12299404551.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_off00006199.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6199	4916 bytes
SHA-256: `43b07eefad56578bb5e662184b2e35f03681c61e8c379f59055c079fa44a2d4a`
`font_01_sfnt_off00007246.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7246	10612 bytes
SHA-256: `57d693c9dabe1016e30c7b7a8d6561cbe506e43676052c65dda656b88117a83d`

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