MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised CMS upload storage. The 'SE_CALLBACK_LURE' heuristic suggests the document's content is designed to trick users into calling a phone number, consistent with callback phishing or tech-support scams. While no scripts were explicitly extracted, the presence of embedded PDF objects and the ML classifier's high confidence suggest malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9902
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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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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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://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/kukuzobenuwijozexuviwute.pdf
- http://progfin.pl/userfiles/file/39463011686.pdf
- https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbc692b3b8---72816368662.pdf
- https://asthasupermarket.com/userfiles/file/folupavakexifimomujatono.pdf
- https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085e616704c4---mivizigunuvanuvexiriza.pdf
- https://sailstudy.in/ckfinder/userfiles/files/76258079181.pdf
- https://adreshosting.com/calisma2/files/uploads/valoj.pdf
- http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085aca89b319---wosevefujabiwe.pdf
- https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/837c68cf23e6608a4da3510807589ee0/93660349396.pdf
- http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cdfb7f687---56936206906.pdf
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/g9ufkq5jch2n2n34sf3q5ve8vb/87053249738.pdf
- https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/65d8d1d765c756a69512b8a547b982c2/tuwaritozadizunigubatazod.pdf
- http://xn--80aamdqpfpr.xn--p1ai/upload_picture/8995486223.pdf
- https://twfern.org/upload/ckfinder_temp/files/20210609145322.pdf
- https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/4fcf9c0952e295681b1a72c513706c10/33166016289.pdf
- http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae6b900c78---89803541628.pdf
- http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d08352da53---55647367765.pdf
- https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/sa6o8dpd72gse3b4nbki7k08ht/kepalaxuw.pdf
- http://topas.lt/userfiles/file/sofemifubudipemapobokopeb.pdf
- http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5d7473dd0---20426084142.pdf
- http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/botuvopeledapemonabifozuf.pdf
- https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dc96bfdb2---42966385437.pdf
- http://yaqeen-eg.com/userfiles/file/susomusafu.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=ves+entertainment+system+manual
- 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_off0002390d.bin8435ecdc123817b919346ae4bec13976c66a15fa7525a717d3e7bcd9e6715c2f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x2390D | 18644 bytes |
font_01_sfnt_off00026aba.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x26ABA | 16792 bytes |
font_02_sfnt_off000282d1.bin1ef4dc2e82c8ac4fbbb67eeda07dfbda8daadd87d980412dfc7a31d1d6f2bde1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x282D1 | 10332 bytes |
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