PDF malware analysis — malicious · 5c02b69136027800

MALICIOUS

PDF

78.6 KB Created: 2021-05-03 13:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: c81452cccaec5b8aa3639910950ca9f5 SHA-1: 926e5f58f3ae90f0b75adcce723b30310204b7ea SHA-256: 5c02b69136027800fb0267b32fffc8ac2dcd5691abdc02a16a29887a141bce61

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to 'how to update' and the authoring application, suggesting a lure. The presence of multiple external URIs indicates an attempt to redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://pelibifir.ru/strik?utm_term=how+to+update+sena+smh10 PDF link annotation
- https://pepusaneped.weebly.com/uploads/1/3/4/5/134503703/77e5f1ac6d6051.pdfIn PDF document text
- https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/c1c1ada56f9528.pdfIn PDF document text
- https://lesivemiseleji.weebly.com/uploads/1/3/1/3/131381961/de58e4.pdfIn PDF document text
- http://futigovu.scienceontheweb.net/fuzidimawopoxali.pdfIn PDF document text
- https://cdn.sqhk.co/bexefoboxevi/qhjhhdb/dofikati.pdfIn PDF document text
- https://cdn.sqhk.co/loxusovi/4ugfijs/56146699217.pdfIn PDF document text
- https://cdn.sqhk.co/vuwewiwudesi/jdOhhib/candy_crush_saga_cheats_level_3104.pdfIn PDF document text
- http://zesenadozefut.sportsontheweb.net/sogemexelusevuxid.pdfIn PDF document text
- https://xilarurizajefa.weebly.com/uploads/1/3/5/3/135347329/xujevigutalatopefafe.pdfIn PDF document text
- https://cdn.sqhk.co/sexobivobufo/hhjamic/talking_parrots_for_sale_near_me_cheap.pdfIn PDF document text
- https://cdn.sqhk.co/biwezabob/fhbahc6/20213952454.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://s3.amazonaws.com/zumomasugipeno/82154110917.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7577139e-b1ce-4f6a-ac85-8391384e647c/sozaxipuj.pdfIn PDF document text
- http://xezaretidatoro.onlinewebshop.net/katazodumipojufakuvitino.pdfIn PDF document text
- https://3a5aa097-47f9-475f-9992-83bceef25cc3.filesusr.com/ugd/f55bec_19bdbf0d73144c1f98a0142117b97b63.pdf?index=trueIn PDF document text
- https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_a6cb09377c3b4eecb62a032e1079fbf2.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/f16c2eb2-2e88-436b-85ec-4680658b1b62/30293492002.pdfIn PDF document text
- https://s3.amazonaws.com/kewakuko/pijewijib.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0ba36d5f-000b-4731-8fb5-1b19ca4ebbc2/99798387887.pdfIn PDF document text
- https://s3.amazonaws.com/wulagisi/noruxo.pdfIn PDF document text
- http://pezefaxovojole.atwebpages.com/55330128739.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a6fb4add-23ec-4bd3-aff0-77982144e36d/autores_del_renacimiento_espaol_literatura.pdfIn PDF document text
- https://s3.amazonaws.com/vuterijoze/sawijodolubaw.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_off0000e7bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7BB	5152 bytes
SHA-256: `f948ca60d2f18749e47640237178d06f8b388740152c40425d332e805ee86f6c`
`font_01_sfnt_off0000f91f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF91F	10976 bytes
SHA-256: `addaa4baf18403a5dba4d51bf7c83dd8f0d0e080ee7461521126eaf5b2f46312`
`font_02_sfnt_off00011ed2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11ED2	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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