MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm with a high number of external URIs, some of which are on disposable domains, and includes a visual download button lure. The document body is heavily obfuscated and unreadable, suggesting it is designed to conceal its malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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://sysquare.com/UserFiles/files/winexoxopavuvewe.pdf In PDF document text
- https://xn--fct8ml6mwue.tw/uploads/files/79686724335.pdfIn PDF document text
- https://xn--p3t29jo1ed4o4xw.tw/upload/files/25738111171.pdfIn PDF document text
- http://weldingplaza.com/files/file/16244318093.pdfIn PDF document text
- http://akiisushi.com/uploads/files/gukogofez.pdfIn PDF document text
- http://mynotary.ca/sites/all/sites/mynotary.ca/files/lemit.pdfIn PDF document text
- http://villabrown.it/userfiles/files/susisukigukuvujaxoxoset.pdfIn PDF document text
- https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/31be303be77f89ed54921dcdb5553de4/48210256855.pdfIn PDF document text
- http://rc-saty.cz/gais/image/file/54104467202.pdfIn PDF document text
- http://hide-bo.com/img/tmp/file/93002205525.pdfIn PDF document text
- http://centrlita.ru/archive/image/file/fajavusufosa.pdfIn PDF document text
- https://prosaison.fr/userfiles/files/lazefuz.pdfIn PDF document text
- http://yizhu580.com/ckfinder/userfiles/files/88062663143.pdfIn PDF document text
- https://media-get.ru/userfiles/files/dajamik.pdfIn PDF document text
- http://antonellascarpittadesigner.it/userfiles/files/fafebojatejowexodumowawep.pdfIn PDF document text
- https://lanhcongnghiepthinhphat.com/upload/files/befaxoratudener.pdfIn PDF document text
- http://biaikatolikus.hu/files/file/mosegiwuminemivore.pdfIn PDF document text
- http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5221a5754---96583092961.pdfIn PDF document text
- http://casadiriposomarsala.it/userfiles/files/mobadumututad.pdfIn PDF document text
- http://uhorder.com/upload/files/10821989221.pdfIn PDF document text
- http://tdvvietnam.vn/webroot/img/files/jorerunawazaved.pdfIn PDF document text
- https://playindiano1.in/ckfinder/userfiles/files/76945188804.pdfIn PDF document text
- https://acrgruppe.de/userfiles/file/89059897587.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=windows+10+iso+download+32+bit+and+64+bitPDF 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_off0000ddcb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDDCB | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000f5e2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF5E2 | 10940 bytes |
SHA-256: 01cfad6f9046dabcfceed65cc06c0f7a992c0ecb85f11292e7a7cf420004ae95 |
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font_02_sfnt_off00010f81.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10F81 | 17520 bytes |
SHA-256: c9ebce72287c6ff2046f1b7e72cdc11994ec2e3014384374da4f6e276717a9aa |
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