PDF malware analysis — malicious · 6f4c6cf7c4b10295

MALICIOUS

PDF

63.0 KB Created: 2020-11-19 02:37:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d53cc4a49b0e59caf4477da6332c056f SHA-1: 604172582600c6a3a3db11b4bf17fa9117c511fb SHA-256: 6f4c6cf7c4b1029590f0a01e8df3a9db473c4e6c511df674921b9a2e18a633b5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier also strongly indicate maliciousness. While no scripts were directly extracted, the presence of embedded URLs and the nature of the link farm suggest a phishing or content-luring attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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.
ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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?utm_term=wmor+tv+schedule
- https://cdn-cms.f-static.net/uploads/4458148/normal_5fa630d2bcee8.pdf
- https://xivuseto.weebly.com/uploads/1/3/4/3/134316593/5271550.pdf
- https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/tipirikuduk_dusufitizibobil_xexekod.pdf
- https://cdn-cms.f-static.net/uploads/4368971/normal_5fa1f87f6e84b.pdf
- https://cdn-cms.f-static.net/uploads/4380209/normal_5f8dc5a78fe7d.pdf
- https://dirotigakavomak.weebly.com/uploads/1/3/4/2/134235834/jirusa-ruzopoma.pdf
- https://cdn-cms.f-static.net/uploads/4412592/normal_5f95bac18631b.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/wilugugo/42855664872.pdf
- https://s3.amazonaws.com/ragejufa/4371943168.pdf
- https://s3.amazonaws.com/rawesaragegugar/10835743853.pdf
- https://s3.amazonaws.com/wujapu/lukodotilojugudosamedo.pdf
- https://uploads.strikinglycdn.com/files/ce2874e3-650f-4460-a923-993d8dc778b4/16059253360.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bb2a.bin` `f4eaa739f15f0e6a2cd1528f5da1c3aa717b0835b3171880c27a39558ede424e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBB2A	5044 bytes
`font_01_sfnt_off0000cc3b.bin` `9e08f207fd22f71ef2af601852317958186ee5cfd039165b02e04ad9117ec229`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC3B	10284 bytes

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