PDF malware analysis — malicious · 6d391b8fe6647488

MALICIOUS

PDF

69.5 KB Created: 2021-09-16 07:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: fde5a1f2889ccd073ef30f6db9433dbb SHA-1: cc035224a9d78dfb1651cb91b88e13daeb3046af SHA-256: 6d391b8fe6647488b6082b33f0afd2ee12d3e017f1f26f05f07550950d33aaab

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs pointing to a link farm hosted on various domains, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. ClamAV also detected this file as a phishing trojan. The primary attack pattern involves directing users to these external links, which likely serve as a gateway for further malicious activity such as phishing or malware delivery.

Machine Learning

Nyx PDF Classifier suspicious score 0.4905

Heuristics 4

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
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://studiopol.it/userfiles/files/liwotawomogakobaj.pdf In PDF document text
- http://aci-immobilier-douai.fr/userfiles/files/zususukujebobij.pdfIn PDF document text
- http://www.masozilina.sk/ckfinder/userfiles/files/3904400874.pdfIn PDF document text
- http://digifast.cz/userfiles/kelopitovezasan.pdfIn PDF document text
- https://varida-tech.com/ckfinder/userfiles/files/numokesakuf.pdfIn PDF document text
- http://niktid.ru/userfiles/file/44984086547.pdfIn PDF document text
- http://hkwwta.org/userfiles/80261726621.pdfIn PDF document text
- https://vanrun-it.nl/userfiles/files/9492669375.pdfIn PDF document text
- http://ekachaiguitarist.com/ckfinder/userfiles/files/sivaxajekozojoj.pdfIn PDF document text
- http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/jorinusazaxepa.pdfIn PDF document text
- http://fisioterapiasuzzara.it/userfiles/files/62233722993.pdfIn PDF document text
- http://abpaluso.com/upload/file/vipumezelebolufezutofaf.pdfIn PDF document text
- http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50784187330.pdfIn PDF document text
- http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/sazagobogu.pdfIn PDF document text
- https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130ff00e87af---9587763796.pdfIn PDF document text
- https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161408e05e6083---komuzojozesetigopap.pdfIn PDF document text
- https://noriupapildu.lt/ckfinder/userfiles/files/rawiru.pdfIn PDF document text
- https://lifesmart.ro/ckfinder/userfiles/files/tisofom.pdfIn PDF document text
- http://westhollywood.ilovepokebar.com/uploads/files/79217468549.pdfIn PDF document text
- https://dukupahit.com/contents/files/bogizuvotogugap.pdfIn PDF document text
- http://salsainkonstanz.de/media/files/10981395378.pdfIn PDF document text
- https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/susutemowavovitopil.pdfIn PDF document text
- http://hkxhjfc.ltd/uploads/files/20210914180509.pdfIn PDF document text
- http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142bc3dabea2---68989121582.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=taught+curriculum+meaningPDF 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_off0000be5e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE5E	10452 bytes
SHA-256: `39e4977d9bc1974002e1880eec4f71cc789b99d9a2e0eee2078436545b95df78`
`font_01_sfnt_off0000d5da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5DA	16788 bytes
SHA-256: `e2bfeade68d77cdac5cae7c9dfd69b93d83431c34fdf4325f32068e7b0414c02`
`font_02_sfnt_off000100c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100C5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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