MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains a link farm pointing to compromised WordPress upload directories, a common technique for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links to PDF files on potentially compromised sites is the primary indicator of attack.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0e31201f4---42484835828.pdf
- http://chongthamnguoc.vn/img/files/sodudedes.pdf
- https://cleartunemonitors.com/ckfinder/userfiles/files/70646108308.pdf
- http://villa-carlshorst.de/sites/default/files/file/55690144226.pdf
- http://tochuchoinghi.org/files/regofofikagenokawajub.pdf
- http://sushi-belovo.ru/files/9302336683.pdf
- http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d44de1b3140---1677273967.pdf
- https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/35269fec854d5e3ef5482123a29753c6/gudelupinuvowifepa.pdf
- https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bb5d97622---67639309173.pdf
- https://mma-montessori.com/admin/ckfinder/userfiles/files/84281023778.pdf
- http://abwrva.com/uploads/files/93708080571.pdf
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97b0be2b8---gigezeganimuxetowejiwu.pdf
- https://doctorchina168.com/upload/files/71352738201.pdf
- https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/806599ed17c96980861ff3117ce0fef1/36122073482.pdf
- http://cbgnfinance.com/userfiles/file/tusufag.pdf
- http://elitvorota.ru/f/file/40706204782.pdf
- http://iglozawiercie.pl/zdjecia/file/88641797914.pdf
- http://bularz-auto.pl/images/userfiles/file/daporupuvefodokixokepiro.pdf
- http://webinaris.eu/ckfinder/userfiles/publics/files/70396227551.pdf
- http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/wazuzukoj.pdf
- https://zbmbudomont.pl/userfiles/file/17090005289.pdf
- http://www.reenactmentmarket.eu/images/wyswig_images/file/4951256210.pdf
- http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b18f1b9c6---46140886097.pdf
- http://promador.pl/userfiles/file/42363020575.pdf
- http://hainescentreasia.com/images/file/73067744956.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=free+calendar+template+2021+april
- 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_off0000ec31.binec5bbf60dd6817f0ab5a2e8a37371ea7a2ac65991fe2a3e25036aa7c2fac2651 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEC31 | 17632 bytes |
font_01_sfnt_off00011a73.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11A73 | 16792 bytes |
font_02_sfnt_off0001328a.bind3ff60e8d6b34ecbb0d8502595aa63959064623696272da0661f7b6d99bc9eca |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1328A | 10656 bytes |
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