MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The file is a PDF containing a link farm that points to multiple compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest a tactic of using compromised legitimate sites to host malicious content or redirect users.
Machine Learning
- Nyx PDF Classifier malicious score 0.9948
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://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767977665e4---4531550384.pdf
- http://drkoopman.nl/cmsimages/file/74036658382.pdf
- https://transpack-krumbach.de/_upload_bilder/_filemanager/file/29006164271.pdf
- https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/pegutemaretamifitoguzek.pdf
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa094bee53---81648623968.pdf
- https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/bbd645fcf3beb2db64823e4ae852d110/sajudotowutavaso.pdf
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc78283de3---41150418369.pdf
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cacaeec765---norefoxowaw.pdf
- https://tycoonmarine.com/userfiles/files/zakudutaxeguxuneludowaza.pdf
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608d23e36b096---30569206188.pdf
- https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/fig77ua3b5i34mq7fn99bsc8t2/jukagekibakaju.pdf
- https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/5tbe194n3ia6k87st80310b175/vinemewa.pdf
- https://projectmine.hu/ckfinder/userfiles/files/votef.pdf
- http://szao-spb.ru/images/news/file/tinuwelitajekavu.pdf
- http://lohs69.com/clients/82366/File/kelemixajiluf.pdf
- https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/cg1vf33ab6n3ofulcitvh09663/setewuli.pdf
- http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5a459737f---46157059363.pdf
- https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083fa8f0762f---50075848158.pdf
- https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/hstn2ijh499jn6bfm8f812thgp/zoluwupogusuwokepulalojo.pdf
- http://birnagarcollege.in/userfiles/file/doses.pdf
- https://jbdclothiers.net/emailer/userfiles/file/nafiwitixeniredamuto.pdf
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b624f30d4---12311101977.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=best+friend+thoughts+in+english
- https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/f9b7ded62556408e53266546345bc042/jezodenaguri.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_off0000f5c7.bin233d8da65eef8d59beef662d06cb5b8f1f3962f0a3ea72c55e9e13be4e665bd5 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF5C7 | 17480 bytes |
font_01_sfnt_off0001235f.bin7b6864ac04e5b0eef5632d2773b9fa30f51b3d0d1a85e8595b73c5babcd91624 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1235F | 10624 bytes |
font_02_sfnt_off00013b62.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13B62 | 16792 bytes |
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