PDF malware analysis — malicious · 4da3a7ca0e9bd131

MALICIOUS

PDF

69.1 KB Created: 2020-11-16 14:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 3fb0ab2528a423ac7b4664c7da9bbb5a SHA-1: 1e0be088c6c4be449957cb7937058132bff8cce7 SHA-256: 4da3a7ca0e9bd131e4adeab256aa755611b7722fde87aca8e2a33b63ef2090b1

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that redirects to a suspicious domain, disguised as a 'Japanese swimsuit size chart'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of an external URI suggests an attempt to redirect the user to a malicious site.

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://trafficel.ru/123?utm_term=japanese+swimsuit+size+chart PDF link annotation
- https://cdn-cms.f-static.net/uploads/4404975/normal_5f95cb3cf1b90.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456989/normal_5fa11fdea53fd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383146/normal_5f9bea2d2a68e.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/kijelopazekune/9467313139.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/785e4714-1e1c-440b-834e-8ee585a73ee2/zisesawixijeza.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c2ebd163-f8f9-45c7-a14d-67ffbe137ced/dolodalujudizetarijamij.pdfIn PDF document text
- https://s3.amazonaws.com/bejenosugede/wijarezu.pdfIn PDF document text
- https://s3.amazonaws.com/xetasif/open_xtra-pc_usb_drive.pdfIn PDF document text
- https://s3.amazonaws.com/bezorito/jotedijitixipez.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e676c06c-b021-4aab-96c6-aafea80d848a/vewariwenomofove.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/97a59b42-4792-49d2-9b39-6ad28738256c/37551235238.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_off0000cdb9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDB9	5272 bytes
SHA-256: `9ddfb951d1d1779047f6ca834bc5098bc627447a85172bd9ad0a6670fa714b98`
`font_01_sfnt_off0000df97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF97	11556 bytes
SHA-256: `76fbba4cf62c949b772f3401c7f3d044af2ccc4cecb35d8d4086798fa6ecb0bf`

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