PDF malware analysis — malicious · 4694f77f43b314df

MALICIOUS

PDF

78.6 KB Created: 2020-11-26 01:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: fdcfdd3315e12d7bf8a203e0dd3e041d SHA-1: bc98b3dbde41496b8163060ca3fce908b6f85dbf SHA-256: 4694f77f43b314dfb80c6ecc063555afcd313668f0f77a606ad1044f140e8fee

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating an embedded URI and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The embedded URL points to a domain that appears to be part of a phishing lure, disguised as educational content. No scripts were extracted, but the overall structure and detection signatures suggest a phishing attempt to redirect users to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 4

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://traffine.ru/strik?utm_term=chapter+38+digestive+and+excretory+systems+section+review+38-2+answer+key PDF link annotation
- https://cdn-cms.f-static.net/uploads/4373985/normal_5f8bd67cc205a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365613/normal_5fa91dc688504.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379379/normal_5f9e7a4bf1467.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368985/normal_5f947dd85f7c4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379221/normal_5fa51ce1a3726.pdfIn PDF document text
- https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/6741250.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/018cc740-a45a-42ee-8fb4-d4cc16fb6b2b/fowasisedibu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ae8c24fb-3b2f-45de-87aa-a4b074665f73/4507006846.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e4ad0965-0ae3-4eb4-9391-744afdc1ad36/74929927310.pdfIn PDF document text
- https://s3.amazonaws.com/mujevubutukoxu/33391587825.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_off0000e8d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8D1	6268 bytes
SHA-256: `8261759fbfd0e112cade185c59b0ec70507b7564364d61f6d43c81f50d6ab848`
`font_01_sfnt_off0000fe16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE16	14988 bytes
SHA-256: `911353a188490ce59ce8fd80e30b8bd41ffd290577ac3de7aab8667c46954db0`

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