PDF malware analysis — malicious · 98307974aa5898bc

MALICIOUS

PDF

66.0 KB Created: 2020-11-11 06:18:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02

MD5: 126ead8de8338fa3b48808bc2cfa6581 SHA-1: e979fb323adb2747fa755986bfdb22fa5396be75 SHA-256: 98307974aa5898bcba948f4a8153a14d104dc7a99c14d0d21d40688a34749dad

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains obfuscated text and an embedded URL. The ClamAV detection and ML classifier strongly indicate maliciousness. The embedded URL, https://trafftec.ru/aws?keyword=intermediate+algebra+study+guide, is likely part of a phishing or malware distribution scheme, disguised as a study guide.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/aws?keyword=intermediate+algebra+study+guide PDF link annotation
- https://cdn-cms.f-static.net/uploads/4380882/normal_5f937c447d673.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368970/normal_5f8828ba85f7c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387810/normal_5f8fd409602ed.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368964/normal_5f8962c8ca391.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4445114/normal_5fa298822fe45.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/babetafaperaxov/96209371822.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ecc8e3de-fc20-4b33-9564-d6ff65f7af05/nutri_ninja_pro_bl450.pdfIn PDF document text
- https://s3.amazonaws.com/ruzaganog/ipad_mini_4_ios_12_user_manual.pdfIn PDF document text
- https://s3.amazonaws.com/rimejiguvif/27874333483.pdfIn PDF document text
- https://s3.amazonaws.com/pazerogasarinu/32494401614.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a4db62f4-c3cf-4536-a6b0-77f6588e99f2/zgrln_elli_tonu_kitapfan.pdfIn PDF document text
- https://s3.amazonaws.com/jovekus/bilobuvexusixubuxiwujitus.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_off0000c40a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC40A	5324 bytes
SHA-256: `98148474270b68bb64f8ae724b0f5d0844e19110f21d7ad24e82550ed777bd36`
`font_01_sfnt_off0000d60d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD60D	10816 bytes
SHA-256: `1918f33252e8340e4868c5475e23016040075919b45fc7130898c0d13a2c026c`

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