PDF malware analysis — malicious · fc39e0c532ecfff3

MALICIOUS

PDF

81.8 KB Created: 2021-09-12 23:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: be44b5a3d6b8a41c413f9a8b7d9cf784 SHA-1: c1adecc28c266aff75d26dd1f35ffb5e72c090be SHA-256: fc39e0c532ecfff3ef0271cab42f25bdced6a4c8246bb78a2796560d9d65e0f3

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs and a heuristic firing for a 'link farm' on disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of a 'download button' lure further supports a phishing or malware distribution attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

Heuristics 6

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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/uplcv?utm_term=nintendo+ds+roms+pokemon+y PDF link annotation
- http://bbmeti.it/userfiles/files/zajuzalitejivapa.pdfIn PDF document text
- http://condominiobrisasdelnorte.com/userfiles/file/tulibitadigebul.pdfIn PDF document text
- https://divanich96.ru/admin/ckfinder/userfiles/files/jotufixukisomejuv.pdfIn PDF document text
- http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/29028795869.pdfIn PDF document text
- https://brazilairporttransfers.com/ckfinder/userfiles/files/wefopokatelorunapu.pdfIn PDF document text
- https://idd.no/ckfinder/userfiles/files/42506884876.pdfIn PDF document text
- https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/3621af854ff048c23b41cb431d77ab44/97321291978.pdfIn PDF document text
- http://uni-soar.com/userfiles/file/dofitulidiwolulini.pdfIn PDF document text
- http://mrpennarak.com/user_file/file/63269737093.pdfIn PDF document text
- https://sharenkon.com/files/79124016442.pdfIn PDF document text
- http://master-sign.ru/ckfinder/userfiles/files/9179631030.pdfIn PDF document text
- https://bepxuyenviet.com/upload/files/levuvezemape.pdfIn PDF document text
- http://citygclub.com/ckupload/files/wozazere.pdfIn PDF document text
- https://qeyeoptical.com/ckeditor/ckfinder/userfiles/files/tofemibejiviwejilozur.pdfIn PDF document text
- http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16133b9cab4845---20884149027.pdfIn PDF document text
- https://cs-nippon-cp.com/mailmagazine/upload/files/61358085042.pdfIn PDF document text
- https://cartolmania.it/file/58559207575.pdfIn PDF document text
- https://associazionemusicaviva.it/uploads/file/98183829006.pdfIn PDF document text
- http://msnladyboy.com/ckfinder/userfiles/files/23798009858.pdfIn PDF document text
- http://generaltubi.com/container/ckfiles/files/mipizerejawadar.pdfIn PDF document text
- https://vsetinrally.cz/userfiles/file/fopemufu.pdfIn PDF document text
- http://davcpundri.com/css/file/rudixewijiwirikevugosokuv.pdfIn PDF document text
- http://bydnjl.com/userfiles/files/fujiriwotujugijuxego.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_off0000d932.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD932	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f144.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF144	18388 bytes
SHA-256: `e21be4a1efe161a26e2e4e32a1c526c7d3e292ad956a8b0bb52808f5882b47b9`
`font_02_sfnt_off00012170.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12170	10528 bytes
SHA-256: `9391d63cacbb8d844400d76a4f62511698e03344c937f8fad0ee0c3a86bf74ea`

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