PDF malware analysis — malicious · 5a447ef33a97c3a5

MALICIOUS

PDF

69.4 KB Created: 2020-11-20 23:34:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: ac6ac15f59d9dfabb616132f13b6f258 SHA-1: 149c59c0b28795206ca05351b6c7beac8eb6c901 SHA-256: 5a447ef33a97c3a571731e2c12f12045ebc488e6fef5986558aeb064a4b8aa41

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a payload or visiting a phishing site. The document body, though heavily obfuscated, appears to be related to a worksheet, reinforcing the lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/aws?utm_term=membrane+structure+and+transport+worksheet+answers PDF link annotation
- https://cdn-cms.f-static.net/uploads/4486359/normal_5fb6e7c639393.pdfIn PDF document text
- https://rozapalevode.weebly.com/uploads/1/3/4/7/134705228/2126539.pdfIn PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382793/normal_5fa2883929052.pdfIn PDF document text
- https://dudasajaje.weebly.com/uploads/1/3/4/3/134362454/5189056.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375887/normal_5fa5a36262539.pdfIn PDF document text
- https://zixokamewi.weebly.com/uploads/1/3/4/3/134386319/7283327.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/xakusineba/celta_course_lesson_plan_template.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/41c81e44-d904-4848-800b-72cdbd282782/72001344753.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f5ed69b0-c737-4ec5-993f-0d7a2c516b61/vapor_pressure_lowering_problems_with_answers.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_off0000d1f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1F1	5580 bytes
SHA-256: `e9d1dd3f8211f4e6c668de3618a59316b3632876a5788ce8ef965f1855b76e7e`
`font_01_sfnt_off0000e4d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4D2	10052 bytes
SHA-256: `9f0749b06e0906e249f35ae13ec857c02cf94f53e57a8e420b4eba559321eaeb`

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