PDF malware analysis — malicious · cf725261991f33fa

MALICIOUS

PDF

72.8 KB Created: 2020-12-10 05:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f93bff2713c1217ba7b61f787f5575a6 SHA-1: b7a2b8318897129e2443a6289bbced865413e38d SHA-256: cf725261991f33fafc62183d12d716c506717c92787ed8becb28cd2c0bbf45cd

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that leads to a suspicious domain, identified by ClamAV and ML classifiers as malicious. The document body, though heavily obfuscated, contains text related to 'big ten standings football', suggesting a phishing or social engineering lure. No scripts were extracted, but the presence of a malicious URL and high confidence threat detection indicate a phishing attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 4

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=big+ten+standings+football
- https://cdn-cms.f-static.net/uploads/4417032/normal_5f9cf668c7fd7.pdf
- https://cdn-cms.f-static.net/uploads/4369323/normal_5f8d2685763dd.pdf
- https://cdn-cms.f-static.net/uploads/4418970/normal_5f981766a5614.pdf
- https://cdn-cms.f-static.net/uploads/4449392/normal_5fa179d5bb7ee.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://static1.squarespace.com/static/5fc10304b8467722f1d4df02/t/5fc15900173fb5383bd4d542/1606506752898/nodoputu.pdf
- https://uploads.strikinglycdn.com/files/863a8f9b-d1f7-4f8f-a587-7868ea1eeb7f/immanuel_baptist_church_colonial_heights_va.pdf
- https://s3.amazonaws.com/sefipa/timeline_template_for_classroom.pdf
- https://uploads.strikinglycdn.com/files/c0fd6fa0-f222-4de5-9b25-25c40104dc55/28059361261.pdf
- https://s3.amazonaws.com/satedafadusizo/fetudokexuzigekuzuw.pdf
- https://uploads.strikinglycdn.com/files/bf7dde9e-d236-451a-969e-ca953fb5541f/13491815373.pdf
- https://s3.amazonaws.com/jofunozuzof/xipizegosegakebilizo.pdf
- https://uploads.strikinglycdn.com/files/80050f21-f9b7-4059-b751-88cc52b8d6d8/pigpen_cipher_worksheet.pdf
- https://uploads.strikinglycdn.com/files/29f4f264-bae7-4dce-a9d6-6b3a06d9e033/kosaj.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d3a2.bin` `6ba7222ad6802f8af56893e770e9fc9fce425fb4b639a74a8cf8eb06f8fa2d2b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3A2	4956 bytes
`font_01_sfnt_off0000e48f.bin` `39b23e704e12f4ff25bc84c439c447465cbc79585dbf69baf3a4e17848fc22c7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE48F	10460 bytes
`font_02_sfnt_off00010814.bin` `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10814	4324 bytes

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