PDF malware analysis — malicious · 509d2c72966bb692

MALICIOUS

PDF

96.3 KB Created: 2021-04-25 06:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 78305891640faca90edfc7e3975de22e SHA-1: 31aebc58b631af69178712069a580035c1719f16 SHA-256: 509d2c72966bb69239eb1a2ce9640b9ab4bb9f6396d6ac752f896e57ded5dc7c

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though truncated and obfuscated, contains metadata related to URL generation and document creation, reinforcing the attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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://jumiwimov.ru/strik?utm_term=how+to+calculate+cronbach+alpha+for+a+questionnaire PDF link annotation
- https://cdn.sqhk.co/sosobita/anpr4Rn/business_process_management_software_wiki.pdfIn PDF document text
- http://joy-todays.online/23283766942yc03u.pdfIn PDF document text
- http://7gusevshop.website/208754173846f2t9.pdfIn PDF document text
- http://metazoaapc.fun/top_down_network_designbouvd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411228/normal_603541adaf578.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4402932/normal_60081b0a32631.pdfIn PDF document text
- https://keguvetazako.weebly.com/uploads/1/3/4/7/134702613/7692826.pdfIn PDF document text
- https://cdn.sqhk.co/noxomosanena/ia9Hjh1/ladobejavuxolotage.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387922/normal_5fdd9e51af7f1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4472503/normal_60233d2e327b9.pdfIn PDF document text
- http://cmb-accueil.com/damuzotimajupv3uwq.pdfIn PDF document text
- https://gajubunumokava.weebly.com/uploads/1/3/4/3/134341855/6f1112bfde71bc3.pdfIn PDF document text
- http://jirafka.space/45748594706d2e9s.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/bufipevuril/beef_short_ribs_nutritional_information.pdfIn PDF document text
- https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_704c46652ec94a9c8c497aa51add7f70.pdf?index=trueIn PDF document text
- https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_efb8c02195ac44aebaf6ae1927076cb6.pdf?index=trueIn PDF document text
- https://ede8a7a3-2377-4e09-926a-401222b31c25.filesusr.com/ugd/81c89d_d7adf85224cd4160b4dfe8e99653286c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/davawina/80003847564.pdfIn PDF document text
- https://s3.amazonaws.com/fevobelijogal/13797953309.pdfIn PDF document text
- https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_f33bf5e1efa048b1b5d29e0950b7a4a4.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vinejivunitego/reporting_taxable_income_to_centrelink.pdfIn PDF document text
- https://s3.amazonaws.com/novifamigot/bhojpuri_video_gaana_app.pdfIn PDF document text
- https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_4a76f9ea180b443eb64a1225f8531d1f.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00011f40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F40	5420 bytes
SHA-256: `ae70060ec5bfbfd20d93a430c241a659a7341113673398e0c186a6fd046f6e7b`
`font_01_sfnt_off000131bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x131BC	13104 bytes
SHA-256: `93d0722ea97d1d8e44e2a45dcfb4ef3004f35ee7a7ce50e61a9cdf4509802943`
`font_02_sfnt_off00015eed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15EED	16068 bytes
SHA-256: `5bf3a568f44d28d5e01ddeb8052344ebf10f005948c245798f42be0336ee4cd8`

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