PDF malware analysis — malicious · 2ad4f5bc4907980d

MALICIOUS

PDF

77.6 KB Created: 2021-09-19 13:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 7a74b0331c4b03721e3a8d0bb439f5ac SHA-1: 6cd0b1565bd88a9e89554d6a82fc027e9b7a0301 SHA-256: 2ad4f5bc4907980d96bb3e51b84f31cdae4ae79c4065511e96cfbf1f46a05ddc

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting or compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

Nyx PDF Classifier malicious score 0.8416

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
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
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://cmf8.ir/data/file/69174997980.pdf In PDF document text
- https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/hk9m8kdnupepmbouupjk21o5s1/ninizawijena.pdfIn PDF document text
- https://tectrongim.com/uploads/files/dituvaminuloko.pdfIn PDF document text
- http://zdrowejaja.com/Upload/file/97958393812.pdfIn PDF document text
- http://madveras.com/ckfinder/userfiles/files/76675780108.pdfIn PDF document text
- http://evola.it/userfiles/files/20611041448.pdfIn PDF document text
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16131d2527bd7a---marejemizifogox.pdfIn PDF document text
- http://sevoir.hu/uploads/file/26259267313.pdfIn PDF document text
- https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/5872017142.pdfIn PDF document text
- http://rucodelniza.ru/userfiles/file/pilalulagatigobakugoganob.pdfIn PDF document text
- http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613672c5cd295---powarobepokex.pdfIn PDF document text
- http://alibabashipping.com/userfiles/file/jubuxufafusasuvezibexotus.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343978e0844---77311484475.pdfIn PDF document text
- https://toppelletmachine.com/d/files/75626841941.pdfIn PDF document text
- https://mumegram.com/userfiles/file/gawiloxivonomigigaj.pdfIn PDF document text
- http://bagiez.com/userfiles/file/fusededarujoj.pdfIn PDF document text
- http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613abfa33af26---51743194202.pdfIn PDF document text
- https://epagneuls-bretons.fr/caningest/images/file/49783638677.pdfIn PDF document text
- https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/sixinatamamigitabez.pdfIn PDF document text
- https://defi128.phpascal.com/userfiles/files/tosisukabivujamarojatosi.pdfIn PDF document text
- https://zerling.eu/nico/images/files/59485732272.pdfIn PDF document text
- http://vstarmp.cn/upload/files/20210901_171054.pdfIn PDF document text
- http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16143bc2961bae---jofugaw.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc4047ae22---jifemabawu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=ghouls+n+ghosts+apkPDF link annotation
- 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_off0000d801.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD801	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f013.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF013	18640 bytes
SHA-256: `5a3c71f0b38f827b159a7044958cbc760db635769f8f2ff070c644fbdfc5b78a`
`font_02_sfnt_off000120b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120B4	10440 bytes
SHA-256: `600bc265690dcb8eb3f135f82352513fd7e65887441488cfa85b3c698f9c3ad6`

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