PDF malware analysis — malicious · d3d24fce7ff3a031

MALICIOUS

PDF

75.0 KB Created: 2021-06-10 17:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: d70a5ac81ad0ba261d30d374be4ff681 SHA-1: 2beac377e7268ebf602fa9d34123f41e61257de8 SHA-256: d3d24fce7ff3a031e5afc8be80b17527df52031aaec4ee06652c693949fcffe4

66 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, with a primary focus on directing users to a link farm related to cracked software updates. The ML classifier strongly indicated maliciousness, and the document's structure suggests it's designed to exploit user interest in such topics to drive traffic to potentially harmful sites. No scripts were extracted, but the high number of external links and the ML detection point to a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://cructi.ru/pbw?utm_term=how+to+update+sims+4+cracked+version PDF link annotation
- https://cdn-cms.f-static.net/uploads/4480749/normal_60614eac8fadd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389820/normal_5fda25d0e7ba1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487208/normal_60659b92cc177.pdfIn PDF document text
- https://tebafazar.weebly.com/uploads/1/3/4/2/134265880/8063258.pdfIn PDF document text
- https://xafokevixutevib.weebly.com/uploads/1/3/2/6/132681308/karebitipobeberik.pdfIn PDF document text
- https://lewumirobubav.weebly.com/uploads/1/3/4/7/134762292/593c46ad7421317.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4421630/normal_5fc9e525614af.pdfIn PDF document text
- https://nebegoxo.weebly.com/uploads/1/3/4/6/134638594/1102872.pdfIn PDF document text
- https://fapotuseji.weebly.com/uploads/1/3/4/7/134712372/1551132.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495973/normal_5fe841f5e26f5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495034/normal_600f5a9b8c6b7.pdfIn PDF document text
- https://lidoporovumo.weebly.com/uploads/1/3/4/5/134506542/lepufopalap.pdfIn PDF document text
- https://navolujute.weebly.com/uploads/1/3/1/4/131483334/miduvutep.pdfIn PDF document text
- https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/883866.pdfIn PDF document text
- https://figeneluniw.weebly.com/uploads/1/3/4/8/134857588/c396829.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/b8973954-09b5-4203-a23d-be0019115036/kuwedomofetenifavide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/156eeed3-1df0-491d-a2bf-2f68b5eaafc7/mebajitudavek.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9615ba37-3106-4ac0-b691-d432bd5587b9/jotojazomixuxuvatom.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b9a48496-3993-4e3e-83c5-6b98f8c07a01/anxiety_workbook_printable.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d9fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9FB	5336 bytes
SHA-256: `21ccf642fb77bd9c303639126a5a672305fea9609ef0af08d1425566ef8f69e1`
`font_01_sfnt_off0000ec21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC21	10680 bytes
SHA-256: `e505ab899f09c4dea0e1169b9a43e56539412ef1e80642d82150b53fef061049`
`font_02_sfnt_off00011088.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11088	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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