PDF malware analysis — malicious · eb0099d70c2336ff

MALICIOUS

PDF

86.8 KB Created: 2021-09-06 01:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 19a4b4089e8e265ef10b62f7dd26d676 SHA-1: 8484993db0741c71a649c9fb797fb1f1f9bfa65a SHA-256: eb0099d70c2336ffe417bdf7e84d02acedbffd0ad84e621768a8b9799e357429

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

Heuristics 5

PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://coretry.ru/uplcv?utm_term=jazz+patterns+for+saxophone+pdf PDF link annotation
- https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/c34c140866d846cf9572fd1bad10fe56/femipaxodaxugufosus.pdfIn PDF document text
- http://disonde.com/filespath/files/20210819160824.pdfIn PDF document text
- http://szkolaprzybranowo.pl/ckfinder/userfiles/files/87015037195.pdfIn PDF document text
- https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/9pgj1va00di32e8f8t5j9bavql/44342625794.pdfIn PDF document text
- http://recrute.fr/files/files/23077188529.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612544cd62b14---kuvaxowesegifalokerenazi.pdfIn PDF document text
- http://calhi1974.com/clients/46234/File/59586886370.pdfIn PDF document text
- https://juniorclublivorno.com/sitonews/images_upload/files/podivuluxoxitijivilib.pdfIn PDF document text
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16093e6a48e74b---gakidasuzoruborufuk.pdfIn PDF document text
- http://bmsorganica.com/userfiles/file/babafamabiparawaxesi.pdfIn PDF document text
- http://chandigarhdatarecovery.com/files/file/zupajifajizowodowavedu.pdfIn PDF document text
- http://sakuragiramenandsushi.com/uploads/files/fojurareses.pdfIn PDF document text
- http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de81a07895---66919745033.pdfIn PDF document text
- https://bedandbreakfastchia.it/userfiles/file/karajelinokasapisekobosul.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/s3760q1b7aqllo73fbt736p3in/6714086659.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/a80a9ptr8grirmfdpeia3ba9f3/82201579474.pdfIn PDF document text
- http://2478.ru/admin/ckfinder/userfiles/files/gemidulinunavewafuwi.pdfIn PDF document text
- https://computerzone.pk/file/bisipa.pdfIn PDF document text
- http://divyabodhanam.org/userfiles/file/33118404262.pdfIn PDF document text
- https://dialogueinpraxis.net/files/docs/53306641120.pdfIn PDF document text
- https://marathonblainville.com/userfiles/files/xirexoranuka.pdfIn PDF document text
- https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/fgqshbq102u4qvv58i40fgt6s1/junadolifutopupipadavosub.pdfIn PDF document text
- https://llibreriaha.com/img/events/file/3022525914.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/5862830f018a69683ca8013799f0b0b4/39080263785.pdfIn PDF document text
- https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/dc4ok92sfk4c693qjv2cm06ppt/bilonipinome.pdfIn PDF document text
- http://ahxxzx.com/userfiles/202105/file/kutitujekizojobeto.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://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_off0000eba9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBA9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000103c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103C0	10612 bytes
SHA-256: `bea350586152e349924188830aa3969045a6fd21b37eb304450282215862f3ca`
`font_02_sfnt_off00011c05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C05	18636 bytes
SHA-256: `4869fcc00f87b6a805a805db7f879e4f2b1d260d1f0cea639646ac6040ba01e6`

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