PDF malware analysis — malicious · b0e8168f463d12e6

MALICIOUS

PDF

60.7 KB Created: 2020-11-22 20:48:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d6525f20411f1f148726f8aa548acd5f SHA-1: 7394873e96b2f7b98fd399302c48eec801ea100a SHA-256: b0e8168f463d12e69ba197f09b19d9f919f4c4fc8b158f6c2dc5490a3abdbee8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm or redirection mechanism to potentially malicious websites. The presence of embedded URLs and the PDF structure point towards an attempt to trick users into visiting these external resources, likely for phishing or to download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://traffnew.ru/aws?utm_term=dofe+bronze+assessors+report+template
- https://cdn-cms.f-static.net/uploads/4382974/normal_5fa8106b80874.pdf
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/luroniwabukegu.pdf
- https://cdn-cms.f-static.net/uploads/4416144/normal_5f9959c63fb5e.pdf
- https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/kiwuponeratet_wekam.pdf
- https://cdn-cms.f-static.net/uploads/4454965/normal_5fa34be92c4a1.pdf
- https://cdn-cms.f-static.net/uploads/4385863/normal_5f9945b5af98e.pdf
- https://cdn-cms.f-static.net/uploads/4388416/normal_5fadc4bbef0e5.pdf
- https://cdn-cms.f-static.net/uploads/4475383/normal_5fa51ab6b64b1.pdf
- https://cdn-cms.f-static.net/uploads/4366628/normal_5f92c3abce088.pdf
- https://cdn-cms.f-static.net/uploads/4465907/normal_5fa51a7b3e741.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/viromibukoleliw/mahalaxmi_calendar_september_2019_marathi.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_off0000b459.bin` `559c3c6d33c6cff6e070cad9d351631950429faab064cd89f2da3bd3a19167a9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB459	5236 bytes
`font_01_sfnt_off0000c61b.bin` `f3c7d47a1ca2b9aeab9a09a44af6846ce59c489bedb091be6304b790383fd7c2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC61B	9292 bytes

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