PDF malware analysis — malicious · 2fccd0ecfe2698ef

MALICIOUS

PDF

82.3 KB Created: 2021-09-08 17:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 707dc0113453a69f22dfd57571d991b6 SHA-1: b380a49f82991bba00ea007085d9e89fc58674e6 SHA-256: 2fccd0ecfe2698ef702c1480d8fb9bf6f03f9ff8e792f6cfd0a11f47dc45e20c

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external links, several of which point to compromised WordPress uploads or disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 7

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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 http://sovaimm.it/userfiles/files/wudomaxagi.pdf In PDF document text
- http://www.alcera.ca/userfiles/file/jubipugazarikelexogikak.pdfIn PDF document text
- http://iranjobex.com/cache/fck_files/file/lupol.pdfIn PDF document text
- https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/e3b14e21ab2b2c583639ad514c076687/1804554355.pdfIn PDF document text
- http://thestarbusan.com/FileData/ckfinder/files/20210901_CBF3BB20F535D973.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/jevomuraz.pdfIn PDF document text
- https://blugarden.eu/file/dilewagomaguzo.pdfIn PDF document text
- http://gordostcrista.ru/userfiles/file/zoweraz.pdfIn PDF document text
- http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/fopexabusodor.pdfIn PDF document text
- https://valgott.com/images/userfiles/file/86275413802.pdfIn PDF document text
- https://ihappywash.com/uploads/files/202109020315521244.pdfIn PDF document text
- http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/7e06960b391c5753b03d8a6ff5804573/72995702650.pdfIn PDF document text
- https://e-tta.com/app/webroot/userfiles/files/lenodurabobutire.pdfIn PDF document text
- http://www.anjhimayath.com/upload/file/94779083215.pdfIn PDF document text
- http://biomehl.com/images/content/files/66282192209.pdfIn PDF document text
- http://studiotecnicopetrillo.eu/userfiles/files/85907144319.pdfIn PDF document text
- https://drosamahetta.com/userfiles/file/zofekujozilabenibove.pdfIn PDF document text
- https://www.adoz.cz/ckfinder/userfiles/files/4698650375.pdfIn PDF document text
- http://tksvolga.ru/userfiles/file/nexuzik.pdfIn PDF document text
- https://kalyna.ua/sites/default/files/userfiles/file/vevinagaxenexivek.pdfIn PDF document text
- http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/begese.pdfIn PDF document text
- http://vasekurzy.cz/userfiles/file/nuxexugubugore.pdfIn PDF document text
- http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/3694168924.pdfIn PDF document text
- http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130972d7f80d---87698031750.pdfIn PDF document text
- https://yogaspotny.com/userfiles/file/28786496258.pdfIn PDF document text
- http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36201341666.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=maths+basic+all+formula+pdfPDF link annotation
- 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_off0000d921.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD921	10884 bytes
SHA-256: `38da422dfc69d82f51a2cb829351c9e48df4ac57c83063e364bbb6ba2169c8a8`
`font_01_sfnt_off0000f213.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF213	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010a25.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A25	19180 bytes
SHA-256: `34e4a00e37e1ad493cd601f295ef12b53125f8bb0559e517cd6093b00457287c`

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