MALICIOUS
236
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file is a PDF document detected as malicious by ClamAV and an ML classifier. Heuristics indicate it contains links to compromised WordPress uploads and a link farm on disposable hosting, suggesting it's part of an advance-fee scam. The document body is heavily obfuscated, but the presence of external URIs and the overall structure strongly suggest it is designed to trick users into downloading further malicious content, likely another PDF.
Machine Learning
- Nyx PDF Classifier malicious score 0.9911
Heuristics 8
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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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PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LUREDocument contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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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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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 https://kingdom.vn/userfiles/file/72243548735.pdf
- http://soc-in.com/data/media/files/86884089891.pdf
- http://nscenter.cn/upload/files/dokipenodowazipu.pdf
- http://hortherbpublisher.com/files/upfiles/file/50615885862.pdf
- https://studybrilliant.online/app/webroot/img/userfiles/file/vugibikewumonaga.pdf
- http://ambulatorioveterinarioscapindandrea.it/userfiles/files/40928593788.pdf
- https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/b78ba0ef4fed9578e89c5ff79c6b10ce/rixife.pdf
- http://boldogelet.hu/media/busisil.pdf
- https://tanhaithanhvalves.com/quangcao/admin/file/lesisimoxikekoxe.pdf
- http://studiomanzetti.it/userfiles/files/kakefi.pdf
- http://lakesnwoodskerala.com/uploads/file/3996558868.pdf
- https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/dml6cjkgmsg9sgt4mifgo92soa/44204921801.pdf
- http://hoya889.com/upfile/files/20210911070604.pdf
- http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/winilox.pdf
- http://dainindo.com/Uploads/userfiles/files/62935049882.pdf
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f0a9f29a8---litabinij.pdf
- http://co-wemart.com/careeruserfiles/file/wofafatonilir.pdf
- https://magiccat.pro/ckfinder/userfiles/files/vipupafusuvob.pdf
- http://nexxstep.nl/userfiles/file/pazujifazirewirobulumiz.pdf
- http://hanarotalk.com/userfiles/file///wufagapeloxipujuz.pdf
- https://defi128.com/userfiles/files/21782016013.pdf
- http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161338f377d55c---1811898087.pdf
- http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/d8ec36f9c2823e12e183ee0ede675b23/33081030018.pdf
- https://alajuusa.ee/media/contents/file/jupogobosutumemisagazozot.pdf
- https://detectiveoffice.net/userfiles/file/31871113878.pdf
- https://bccphil.paramedix.biz/uploadfiles/file/53034184584.pdf
- http://only-svet.ru/upload/files/demizelunamoromopirazok.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=android+tablet+keyboard+not+showing+up
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000dc13.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDC13 | 16792 bytes |
font_01_sfnt_off0000f425.bin4929e45f7f1a7f18e76915b1776b3bdd78349535047e263e54ebdf90b7cdf909 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF425 | 18756 bytes |
font_02_sfnt_off000124d6.bin71f048a8ed81d9ce0df58159f7fd59079b2bb5a9f5c8f9d9ca144d0d7c7d6883 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x124D6 | 11184 bytes |
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