MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves leveraging these links to facilitate phishing or distribute further malware.
Machine Learning
- Nyx PDF Classifier malicious score 0.9981
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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://allytemp.ru/uplcv?utm_term=numbers+that+have+more+than+2+factors
- http://bbmeti.it/userfiles/files/suvedijewuwozilel.pdf
- http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613319f14e487---58447569951.pdf
- http://avon-bratislava.com/files/files/9649602415.pdf
- https://apaman.ti-am.jp/js/ckfinder/userfiles/files/84037011093.pdf
- http://notariocprietoa.com/notaria/documentos/files/78011114133.pdf
- http://ros-audit.com/i/up/file/41212911443.pdf
- https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/pt7i4gdn49j93g230lh1f37n8l/80817543627.pdf
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd3c8ef5b8---10287887185.pdf
- http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19204973518.pdf
- http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/161353b3335f67---97141223763.pdf
- http://marymo.ru/uploads/files/54065517069.pdf
- http://lightningriskassessment.com/ci/userfiles/files/genunibawejinevadiva.pdf
- http://giovanninociti.com/userfiles/files/412473047.pdf
- http://i-physiology.ru/upload/zulojoruzudubomanafot.pdf
- https://onderdurdu.com/upload/ckfinder/files/5524366685.pdf
- https://qfuse.it/images/uploaded_files/ckfinder/files/1632353238_f020c43ed3.pdf
- https://global-product.org/CKEdit/upload/files/bejuw.pdf
- https://nichecnk.leaddeehub.com/userfiles/files/famagefufuboxivelawu.pdf
- http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142197174e2b---32156381688.pdf
- http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/birelonebifo.pdf
- http://www.vikingmaterials.com/img/dakili.pdf
- http://yule-sign.com/upload/editor/file/20210914181540.pdf
- 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_off0000dad9.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDAD9 | 16792 bytes |
font_01_sfnt_off0000f2f0.bin65b1534a4ed3bc3036289f4ddd78541b3f6a581f6ce4526cdd8dbac5eb9bafa6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF2F0 | 10868 bytes |
font_02_sfnt_off00010c00.bin2adbb8d838bb20b39cbf4caf31f906456b467405ce39785ff67081f6a5a976b2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10C00 | 18316 bytes |
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