PDF malware analysis — malicious · 2dfa1666931a9700

MALICIOUS

PDF

83.8 KB Created: 2021-04-06 23:40:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 17c631575bd103927338622e46a2ab94 SHA-1: 26b3e1f82b70b8a71967bc6dede97f81ec99e29d SHA-256: 2dfa1666931a9700df5789c65c07270c328f7f2d3ce44728b177b85880060f26

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness. The presence of external URIs and the link farm heuristic point towards an attempt to redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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=what+is+the+coso+framework PDF link annotation
- https://cdn.sqhk.co/wibezudak/RHjojgr/xuvipipizemedajilifaku.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4474475/normal_60544ff4c23c9.pdfIn PDF document text
- https://cdn.sqhk.co/xovikojux/qjghegg/46564789493.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4445534/normal_6019bae959a8f.pdfIn PDF document text
- http://nosatines.mypressonline.com/54903122092.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469358/normal_601396cfae8e4.pdfIn PDF document text
- https://cdn.sqhk.co/gulizate/nighgFY/free_tracing_numbers_1-_100_worksheets.pdfIn PDF document text
- http://mimivudarevi.scienceontheweb.net/87529654501.pdfIn PDF document text
- https://cdn.sqhk.co/kalusoxat/hfjhhMc/operations_management_online_courses_canada.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454973/normal_604a208daba4f.pdfIn PDF document text
- https://cdn.sqhk.co/sakupiraf/aXibejh/kisudunixafidebibidusawot.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4403266/normal_60049c234c523.pdfIn PDF document text
- https://cdn.sqhk.co/vozaxodep/hgifjbS/xikatosivox.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368504/normal_5fedec6342ef0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480753/normal_60168c1f109d2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487186/normal_6023ffae145b2.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://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_5acede26d7f44ebaa0a305255fc36812.pdf?index=trueIn PDF document text
- https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_584554a6cf7c44f2952aad4be46bbe37.pdf?index=trueIn PDF document text
- https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_2d14bf596287456ca434cb6b5a4b76c4.pdf?index=trueIn PDF document text
- https://ff8eac81-0dee-4da4-b7c1-1dee070544a7.filesusr.com/ugd/2637cf_26cb49b49dc44b35bcd621299966e4d1.pdf?index=trueIn PDF document text
- http://mojozore.myartsonline.com/44708826043.pdfIn PDF document text
- https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_d65282625348482cac8dbfa60452dcd6.pdf?index=trueIn 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_off0000ff3a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF3A	4940 bytes
SHA-256: `a486780d28f5d2707d24a9d11f42ebee0cfb5f33b56a0db9eefa59d0bc65e436`
`font_01_sfnt_off00011017.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11017	10432 bytes
SHA-256: `859d30969539774c4cde0a7148014b47de76a422c21a4d88f644627d58d4ad30`
`font_02_sfnt_off000133cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133CF	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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