MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve as a distribution mechanism for phishing or malware, aligning with the Spearphishing Attachment technique.
Machine Learning
- Nyx PDF Classifier malicious score 0.9956
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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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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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://remproekt-m.ru/admin/ckfinder/userfiles/files/91690798401.pdf
- http://sh-ruiyangcpa.com/userfiles/file/2021-6///202162010998868.pdf
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c269fccde4f1790f9cee700a27639437/90715586390.pdf
- https://codecs.ro/images/file/81533296921.pdf
- https://maclashoes.it/file/gediginuzinolikusifoli.pdf
- https://elektrona.cz/files/file/39813735802.pdf
- http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607abfe882954---44483724947.pdf
- http://lawngo.net/fckfiles/39192591125.pdf
- https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e74e581e79---62085541903.pdf
- http://drivescuolaguida.it/userfiles/files/50067488009.pdf
- https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/321bfac7d530894300283729e1a6c003/xogojoda.pdf
- http://wjvanderheidedienstverlening.nl/uploads/file/gufakowufobogozuvi.pdf
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160beaa7c5468e---33809993168.pdf
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aaad119b199---76903481840.pdf
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf6a66a3c5---jitujalozinidivoj.pdf
- http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2e53e043e---58644512686.pdf
- http://www.cerel.eu/images/wyswig_images/file/tiwowinuguwasavirosavali.pdf
- https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/2a3bn5jbk3icgdb0d3c3j3md95/4680198934.pdf
- https://aftaplan.com/works/peepsparty/html/upload_files/file/74291735670.pdf
- https://beatmuellerfoto.ch/userfiles/files/wenoz.pdf
- http://kgmda.com/upload/files/livomifimepodema.pdf
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/9468rrd7s7vm6ce6bcbli5mnfe/22351734815.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=cubic+in+to+cubic+yd
- 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_off0000e707.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE707 | 16792 bytes |
font_01_sfnt_off0000ff1e.binda618c84470fd113325764f2550010fe82d14bbb2a876e8050b69e6591571dac |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFF1E | 10140 bytes |
font_02_sfnt_off000115e9.bina4455a8bdebd7e3cdb4cc21485f21391cd50046666a4ed51f7ca0de686a7da82 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x115E9 | 18084 bytes |
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