MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a link farm pointing to various domains, some of which are hosted on compromised CMS upload storage, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, combined with the 'SE_INVOICE_LURE' heuristic, supports the conclusion that this is a social engineering lure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9955
Heuristics 7
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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 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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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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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://andrejc.si/files/file/73818621645.pdf
- http://serdceprirody.ru/userfiles/file/figajazovida.pdf
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcaacd9d8b---rirani.pdf
- http://noospc.ru/SITE/files/editor/file/fubefasaba.pdf
- http://www.toptehnik.si/images/vegupegix.pdf
- http://bjaimama.com/data/upload/2021/05/file/202105301053582055.pdf
- http://showplus.ae/userfiles/files/62957871322.pdf
- http://www.abcklima.hu//data/editorfile/67355670837.pdf
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea6a12740d---39713020318.pdf
- https://used-machinetools.ro/app/webroot/files/userfiles/files/vomufowela.pdf
- http://bfr-bialapodlaska.pl/userfiles/file/pabizimufetagupolotonise.pdf
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/e366910f69db20145be487f1cabd55d2/37689231028.pdf
- http://minerva-collection.net/files/files/fabarapi.pdf
- http://dagmar-e.de/userfiles/file/powulabubewir.pdf
- https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa29c1fc10---vegidasafulivewunu.pdf
- http://bdn10.cz/files/file/96651381559.pdf
- http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a83b5b95156---sujozulugudareted.pdf
- https://volgogradexpo.ru/ckfinder/userfiles/files/68928823142.pdf
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608772fb5cd50---74722012730.pdf
- https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5c422feff---48188983734.pdf
- http://bud-drog.pl/userfiles/file/17487914055.pdf
- http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/20875388775.pdf
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d52dd0142ca---pagezepigari.pdf
- https://fanaf.com/article_ressources/file/39243613262.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=please+confirm+the+receipt+of+this+mail
- 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_off0000e581.bin14dfcd3975ed9c05e2d60a57a2005935c20fce6170e6006e0f51a92596871374 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE581 | 16892 bytes |
font_01_sfnt_off00011151.binb8f32897d7ec83dba99f789b5b49f75074b1c97526cb49ecf8f363e27b7e0e12 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11151 | 10744 bytes |
font_02_sfnt_off000129d0.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x129D0 | 16792 bytes |
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