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 numerous websites, several of which are hosted on compromised CMS platforms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.
Machine Learning
- Nyx PDF Classifier malicious score 0.9949
Heuristics 6
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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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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://yule-sign.com/upload/editor/file/20210703115328.pdf
- http://usarsenal.it/userfiles/files/82859766111.pdf
- http://csc0451.com/userfiles/file/20210611153013_8ymw22.pdf
- http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5290da6038---tanekinojibal.pdf
- http://phrabat.net/UserFiles/File/93714102722.pdf
- https://amitadevnani.com/userfiles/file/43924414328.pdf
- https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/b69jchcrbj9vjjr4p7d07vpm0j/24066993088.pdf
- http://alexlunacoach.com/img/editor/file/28534092742.pdf
- http://phoiinnhiet.com/images/uploads/files/82838599273.pdf
- https://akapacha.com/userfiles/file/8248924389.pdf
- http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aac09b05ea---49669416696.pdf
- https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/kanadoutjb8cnh5lq9rmrj91l4/vujomapefekejadunavi.pdf
- http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72067b879e---22168830108.pdf
- https://aashianarealty.com/file/dotigaxod.pdf
- http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc67260f90---48100543078.pdf
- https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/49f1a6d147607a6bf508192a5970e7d2/84752626579.pdf
- https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/49b06a92099def0f8f8d0090adf654e9/40343843920.pdf
- http://inspiredindianfoundation.org/uploads/53853482974.pdf
- http://www.irrv.org/uploads/files/bunuvuvipug.pdf
- http://vantaibactrungnam.vn/upload/files/62737611662.pdf
- https://menu2uplus.com/images/file/vuxixiwepobuwujarufu.pdf
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/q01sbdo4pgl6uoq6a42s4q8nbh/76752711358.pdf
- https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/19b26689a0fe5960638bbfddcc66308f/14989167265.pdf
- https://szaniterplaza.hu/ckfinder/userfiles/files/80632225723.pdf
- http://openendrep.com/userfiles/files/84766543217.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=chicken+salad+recipe+without+mayonnaise
- 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_off0000d60b.binb9ff2a7764e630a2af74179cdd706f8e94d55e572f5ed953bb6149094fa810b2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD60B | 11200 bytes |
font_01_sfnt_off0000f030.binb9798a927373545d03bbf0b9a3e39ab85732b134dda4b7905f2ca30097ddead0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF030 | 17052 bytes |
font_02_sfnt_off00011c9f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11C9F | 16792 bytes |
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