PDF malware analysis — malicious · 625381610544a188

MALICIOUS

PDF

78.1 KB Created: 2021-09-20 08:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: ebad0f6ce93f4cfdc8d14a98de9b97f5 SHA-1: 5d20e0f523763106170cf0e52f71a0976f0ec43c SHA-256: 625381610544a18848ed71ee9b96b872a47eba03b4b01f6c6e65084c882d15cb

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous embedded URLs, many pointing to disposable domains, and exhibits characteristics of a link farm. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's output suggest malicious intent, likely to redirect users to phishing or malware hosting sites.

Machine Learning

Nyx PDF Classifier malicious score 0.7431

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 https://kotypsy.pl/ckfinder/userfiles/files/kiluraregupabejo.pdf In PDF document text
- https://strings97.hu/userfiles/file/fasuvak.pdfIn PDF document text
- https://altinhediyeler.com/calisma2/files/uploads/foxeretejulozuxawesuvobu.pdfIn PDF document text
- http://chinahongji.com/d/files/25217513862.pdfIn PDF document text
- http://agilesolutions.in/uploads/75179134310.pdfIn PDF document text
- http://topoint.net/userfiles/fckFile/20210907223706.pdfIn PDF document text
- https://renhedc.com/uploads/files/202109152323078673.pdfIn PDF document text
- http://elmbbq.com/uploads/files/lefedajodexadipoza.pdfIn PDF document text
- https://www.hmgfinance.com/ckfinder/userfiles/files/54516913006.pdfIn PDF document text
- http://denkobarbell.com/_upload/files/vewelakur.pdfIn PDF document text
- http://gursakaryahukuk.com/images/file/39702699056.pdfIn PDF document text
- http://fd-health.com/upload/ckeditor/files/puwolubovog.pdfIn PDF document text
- http://norilskgu.ru/userfiles/file/98821974713.pdfIn PDF document text
- http://derkwoo.com/upload/editor/files/59682622442.pdfIn PDF document text
- https://vayamcs.com/content_files/files/soxegirerijatojenawix.pdfIn PDF document text
- https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/28c5935b0618fd63a27eb453850ad5dc/8065361570.pdfIn PDF document text
- http://tuttotop.com/userfiles/files/85551348963.pdfIn PDF document text
- http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/21769259795.pdfIn PDF document text
- http://tecs4.com/intranet/ckfinder/userfiles/files/posivigoruxatusuvi.pdfIn PDF document text
- https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/161396c61b2ad0---82542808545.pdfIn PDF document text
- http://sherwoodonionfestival.com/ckfinder/userfiles/files/vaxeperilirisolez.pdfIn PDF document text
- https://spitalmoldovanoua.ro/ckfinder/userfiles/files/wates.pdfIn PDF document text
- http://www.ks-klinika.ru/ckfinder/userfiles/files/zanaxuno.pdfIn PDF document text
- http://burragebrothers.org/demo/jolie/beta/userfiles/files/jedezurevokuvubaj.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=tekno+miles+skeletunPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e09c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE09C	19620 bytes
SHA-256: `94ee4f103db288cf03bbb177df5c9956bcd47a54829ca002416342e5bf177de2`
`font_01_sfnt_off00011481.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11481	10160 bytes
SHA-256: `6fa6674dda317dd754a83fd4221355f0297a08f8f47331acd767e5a9617533a9`

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