PDF malware analysis — malicious · 5ce4a15354014a87

MALICIOUS

PDF

75.0 KB Created: 2020-12-28 09:26:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: abc8e8887b100e28e058c0daee6d158f SHA-1: 9488492f97b637a8c97c827c9c5c252915e88314 SHA-256: 5ce4a15354014a879a7a478914ba87b2d2a85b716db338ea00812f1ef57631d0

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely as part of a phishing or social engineering scheme. The document body, though heavily obfuscated, contains text related to 'bank regulation' and 'wkhtmltopdf', suggesting a lure to trick users into visiting the malicious URL.

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://trafffe.ru/123?utm_term=importance+of+bank+regulation PDF link annotation
- https://cdn-cms.f-static.net/uploads/4417813/normal_5fa058655077f.pdfIn PDF document text
- https://cdn.sqhk.co/fifapupifig/hegKhda/c_compiler_ide_download.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446017/normal_5fd7275a9e95b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417818/normal_5fa1503db3ab7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365621/normal_5f8883a87bd0c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409258/normal_5f99633f80b4e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4465719/normal_5fccfd1b2bac5.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/fosagoba/44789729619.pdfIn PDF document text
- https://s3.amazonaws.com/samopakamefap/mi_guia_para_resolver_el_curso_aprendizajes_clave_preescolar.pdfIn PDF document text
- https://s3.amazonaws.com/pesetufavo/wirapusotakax.pdfIn PDF document text
- https://s3.amazonaws.com/dazifozixawus/kindle_fire_video_format_converter.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_off0000e81d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE81D	5300 bytes
SHA-256: `abc537fcc98e0aa3d1a7cf773b3c88e2e3673af6ddcea9b0da55c4851be7bb0d`
`font_01_sfnt_off0000fa13.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA13	11060 bytes
SHA-256: `796909a2fa3945a69183c5c7618d2c4031aae7def195288f52b0b5e2f72c8362`

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