MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Numerous embedded URLs point to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
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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QR-code redirect lure medium SE_QR_LUREDocument instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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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://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613526f4c8f42---penabosexewebubusevuri.pdf
- http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614095d929e22---42409543405.pdf
- http://sprinter-lab.ru/content/File/kuzowopupa.pdf
- http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16144fcdb16563---82493168427.pdf
- http://alhambra.kopanramen.com/uploads/files/20230037525.pdf
- http://tcyy88.com/userfiles/file/2021091723534573499.pdf
- https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16148c0f56d06e---30425143991.pdf
- https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/68070923812.pdf
- https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/4f1932b79b40966fafd7c709fd493091/96380243841.pdf
- http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146a8503a3d1---69826523695.pdf
- http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/47709816879.pdf
- http://solis.altrodesign.eu/ckfinder/userfiles/files/85546183800.pdf
- http://umhouses.com/uploads/files/49783964454.pdf
- http://winkeleninzundert.nl/uploadimages/files/gosobobaxuxotu.pdf
- http://www.anapharmata.hu/ckfinder/core/connector/php/files/forubivipefozekujo.pdf
- http://hoanggiaphatland.com/uploads/image/files/wewemixej.pdf
- http://chieucoingason.vn/files/41507312649.pdf
- http://karate-talence.com/newsite/userfiles/files/87338020850.pdf
- http://geotersrl.it/file/10621380900.pdf
- https://sabagdasarov.ru/upload/file/70009686163.pdf
- http://kristiankutschera.de/userfiles/file/lovekesuz.pdf
- http://dabaizhongxue.com/upload_fck/file/2021-9-6/20210906110643389020.pdf
- http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b756486e8---11624544221.pdf
- http://sictombbi.fr/ckfinder/userfiles/files/18337745005.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=gold+rush+download+apk
- 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_off0000b287.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB287 | 16792 bytes |
font_01_sfnt_off0000ca99.bin03ae3c700a21269adb4cadfd947e367803bd01f88cd9f936fdbc2b78c24cfed0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCA99 | 16840 bytes |
font_02_sfnt_off0000f638.binb11904308b18d8c1e30c60bbadc2a86067b19da9a1e88d68cc9a5f1a5101f1ca |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF638 | 10484 bytes |
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