MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with many embedded URLs pointing to websites, some of which are hosted on compromised WordPress installations. The presence of 'cmd1ghsf80ab0/rexafa.pdf' in the document text suggests potential exploitation or command execution, possibly related to a second-stage download. The document's structure and embedded links strongly suggest a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9948
Heuristics 7
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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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LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMANDExtracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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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://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/8d387d6cd60d2406f759096d98764fcb/6778508611.pdf
- http://ca1970.com/clients/10044/File/8543774647.pdf
- http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/puromusawezivogeriluwup.pdf
- https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/45ki92lk6r03icmd1ghsf80ab0/rexafa.pdf
- http://cuuhoatudong.com/upload/files/81979045265.pdf
- https://unosms.us/userfiles/file/11334500083.pdf
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160aed4b12eca7---21231586060.pdf
- https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/65e255cf549899c07451c74bcd19a893/gopiwenekukufe.pdf
- http://bigxra.com/uploadfile/file/2021060606423173499.pdf
- http://medicapoland.pl/uploaded/file/31204713722.pdf
- http://bukvoznaika.ru/ckfinder/userfiles/files/64060562700.pdf
- https://goodluckfishing.com/ckfinder/userfiles/files/xefiwu.pdf
- http://trips-in.com/ckupload/files/99464704546.pdf
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160711e598da23---95520348264.pdf
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/64eae0793f7610420197ec05fff4bb2b/80064517913.pdf
- https://mvpartners.be/images/uploadedimages/file/jomoxenobi.pdf
- https://fong-cai.com/upload/files/93027736470.pdf
- https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/e1f9beddc30716c904d7ab248a1a1de6/3275313417.pdf
- https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/b867gi350igqr29nargpq1qdgc/siduxazopi.pdf
- https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/8be0be0c7fd37ca79249cbf4d7e2ebd3/33698809683.pdf
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b113ef89518---gegakuwofotozimazoxi.pdf
- http://pamat.ro/UserFiles/file/gowujikefakepugamapoves.pdf
- http://roughriders66.com/clients/f/fa/fa96273273f04fd2a06feef12b1e4d70/File/72969813080.pdf
- http://www.contectrade.hu/fckfiles/file/73803825802.pdf
- http://cuuhoatudong.com/upload/file
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=ang+probinsyano+march+30+2021+full+episode
- 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_off0000ccad.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCCAD | 16792 bytes |
font_01_sfnt_off0000e4bf.bin6870c84b3f9f00e7aba06bebdb41d7a162c89a3a02e7a06a58fd5baa6d1b6f01 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE4BF | 16264 bytes |
font_02_sfnt_off00010e86.binec8ca38d25ac19a52ecb564ac99709264e188bdec854e417abb472347e63922e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10E86 | 11768 bytes |
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