PDF malware analysis — malicious · 5a231661d6c55a3d

MALICIOUS

PDF

58.2 KB Created: 2020-11-25 04:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 94839ba2b1cf0b6dfd483492ed93b106 SHA-1: ddbbb9e35b42f6aa8d157ce8bb431d7b65625b59 SHA-256: 5a231661d6c55a3d1b5de156cf7beade43b2cd3cce8563ba957114113173a344

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to an 'English 1 final exam study guide', indicating a phishing or social engineering attempt. The primary IOC is the external URI that the document directs the user to visit.

Machine Learning

Nyx PDF Classifier malicious score 0.7703

Heuristics 3

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
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://traffset.ru/strik?utm_term=english+1+final+exam+study+guide
- https://cdn-cms.f-static.net/uploads/4465949/normal_5fa26e9a592ae.pdf
- https://cdn-cms.f-static.net/uploads/4368777/normal_5f988169b93be.pdf
- https://cdn-cms.f-static.net/uploads/4372737/normal_5f8c3bd17a56a.pdf
- https://cdn-cms.f-static.net/uploads/4445531/normal_5fac491ad2b74.pdf
- https://cdn-cms.f-static.net/uploads/4387815/normal_5fbbba18b8371.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/lokijuronig/59346844227.pdf
- https://s3.amazonaws.com/jemisajoda/86376440664.pdf
- https://s3.amazonaws.com/dadupawo/technological_determinism_theory_marshall_mcluhan.pdf
- https://uploads.strikinglycdn.com/files/d7810056-f3df-48a7-8939-147604e353dc/xerox_workcentre_7855_driver_download.pdf
- https://s3.amazonaws.com/vatakefojunib/state_ceqa_guidelines_2019.pdf
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d2ff.bin` `d66f8d4b6578ee4344f9a8bfb76cbaca9c2fd4cedb405f8423635e0b82f97f19`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD2FF	5404 bytes

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