PDF malware analysis — malicious · 7f4a99c9d90cb028

MALICIOUS

PDF

83.3 KB Created: 2021-09-21 04:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: d2ee1bdd23d8c2d52026b00b2ed959dc SHA-1: f705ee55e4a3aa5a2d467f8d5728c6a967b8bed7 SHA-256: 7f4a99c9d90cb0281d5ce3097a44855706873cab7d9e5b7456c650331c033f16

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful external sites.

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 http://mesterteto.hu/userfiles/file/62305395536.pdf In PDF document text
- http://digitalqwerty.com/ckfinder/userfiles/files/17797611815.pdfIn PDF document text
- https://www.acta-mobilier.fr/ckfinder/userfiles/files/19950184658.pdfIn PDF document text
- http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6300177085.pdfIn PDF document text
- http://sitoad.com/bbqjoekey/files/202109101644488239.pdfIn PDF document text
- https://mountmoriahcamp.com/media/xuraxugiz.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161334fc46a1aa---xotiditawumijalabuxat.pdfIn PDF document text
- http://tevukasveza.lt/ckfinder/userfiles/files/kesikopuzavosiloril.pdfIn PDF document text
- http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/60674512767.pdfIn PDF document text
- http://mlsy.cz/images/file/files/vefodenetonowevufizuvom.pdfIn PDF document text
- http://spellenindex.nl/images/uploads/ridov.pdfIn PDF document text
- https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/37760215342.pdfIn PDF document text
- http://mxagproducts.com/upload/browse/file/89534745856.pdfIn PDF document text
- https://www.ventisilva.com.br/ckfinder/userfiles/files/roriwokidogesebe.pdfIn PDF document text
- https://adikkeempat.com/contents/files/79306279820.pdfIn PDF document text
- http://adhunikjewellers.com/ckfinder/userfiles/files/22231814428.pdfIn PDF document text
- http://puginternational.com/ckfinder/userfiles/files/palatebuwe.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/cecb3416f1b3ecb2685cafa620ec7a24/rofavimovumefer.pdfIn PDF document text
- https://rjpexport.com/files/ravawodekupug.pdfIn PDF document text
- https://markaoyun.com/calisma2/files/uploads/xomuniputelajujolag.pdfIn PDF document text
- http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/girarunoviropexireju.pdfIn PDF document text
- http://nbc.com.vn/ckfinder/userfiles/files/68183904216.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=monster+game+booster+200+pro+apk+downloadPDF 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_off0000da06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA06	11196 bytes
SHA-256: `1232973fb38eb03323e75945039469179ac16c962cd0e2b112e69487d01c4a29`
`font_01_sfnt_off0000f3ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3EE	19540 bytes
SHA-256: `61f5a48f2ffcd16bc3ff06fa4c1967a7c1906fd5aedf1813aeda834e0c99b035`
`font_02_sfnt_off0001271c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1271C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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