PDF malware analysis — malicious · 9b178aed1e1df570

MALICIOUS

PDF

69.8 KB Created: 2020-11-13 04:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 352295d1362b03491d0422b3598b7764 SHA-1: 1d6f470d776f206b8e1576b08fb6e29f8796ba9c SHA-256: 9b178aed1e1df570315d1af6cfe66fec5a0c41bbaa84a409b7202c431613bb76

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of numerous external URLs points towards an attempt to redirect the user to potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://trafficel.ru/123?utm_term=breathometer+shark+tank+deal
- https://cdn-cms.f-static.net/uploads/4387224/normal_5f99b23314221.pdf
- https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/lerizarigebotisi.pdf
- https://cdn-cms.f-static.net/uploads/4451230/normal_5fa8390dce51d.pdf
- https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/nenubijajasu.pdf
- https://cdn-cms.f-static.net/uploads/4421782/normal_5fa780ca6bf4a.pdf
- https://cdn-cms.f-static.net/uploads/4366374/normal_5fa1d0c49a909.pdf
- https://cdn-cms.f-static.net/uploads/4415073/normal_5fa8c28b28419.pdf
- https://vegilirebaj.weebly.com/uploads/1/3/1/0/131070576/8876174.pdf
- https://kumupesefutevun.weebly.com/uploads/1/3/4/4/134463509/guzupimakuxi.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/vitelitubovuluj/87824241003.pdf
- https://uploads.strikinglycdn.com/files/f4c06e9f-f55b-42d4-8ecc-e95347ac5ca0/executor_for_roblox_free.pdf
- https://s3.amazonaws.com/rorives/fazuf.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_off0000d4da.bin` `1fb170929bc112668d79267bc2dc2aa146fcfb916b0fb515100b13451e0e11d3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4DA	5180 bytes
`font_01_sfnt_off0000e640.bin` `6c625ab0f9839ddcf2f0b6b041c8d2907cf2f85f47bfe205e1820a3c2186e19a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE640	10788 bytes

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