MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as 'Pdf.Phishing.Trojan'. The PDF contains numerous external links, many hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates a potential callback phishing or tech-support scam pattern, further reinforcing the malicious intent. Although no scripts were explicitly extracted, the presence of numerous URLs and the overall structure point towards a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9979
Heuristics 7
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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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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://inwebjor.ru/uplcv?utm_term=thumbnail+in+video
- https://safetyhanoi.com/userfiles/file/fajafememu.pdf
- https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d169b4ca2e---73065316840.pdf
- http://tentauto23.ru/ckfinder/userfiles/files/34774066348.pdf
- http://indianapit.thriftstorewebsites.net/flash/indianapit.thriftstorewebsites.net/file/64077330254.pdf
- http://samurairamenbar.com/uploads/files/28552257419.pdf
- http://humanlitech.com/files/files/71880135730.pdf
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614f23c440799---93047276702.pdf
- http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613edd4076d1f---31124872147.pdf
- http://eubeer.vn/uploads/files/75379127260.pdf
- http://gfk-schwimmbad.de/i/File/wusaluboxiwexiz.pdf
- http://poaglasses.com/uploads/files/202109020100449215.pdf
- https://edex.co/userfiles/files/nibakebufutizegepuworo.pdf
- https://kovtec.pl/eurostyl/photos/file/surefuresodavafiwaduwut.pdf
- http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/giwupiromisosopixobaram.pdf
- https://abhimaninteriors.com/ckfinder/userfiles/files/dolotixepevobizatezif.pdf
- http://technimexvn.com/images/ckeditor/files/vukovopuwubi.pdf
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/e845fb29cbf15019d79a5d8b9867be97/2946341050.pdf
- https://skykharchono.mn/editor/files/wifigubukejenexitixove.pdf
- https://angelsforwarriors.org/userfiles/files/65861679433.pdf
- http://mopi.eu/ckfinder/userfiles/files/buxufonuvolidomiwopit.pdf
- https://kohphanganhotelandtour.com/userfiles/file/65073150368.pdf
- https://mavibusiness.it/file/2380505067.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_off0000b681.bin1148cbce97b4bd4e9e94711b79f7d878f033d80cfad4807ce25b0db07c60052a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB681 | 10416 bytes |
font_01_sfnt_off0000cdc8.bin1f125061ad25eea3599c9bf63fe42ff1c36b192d444075e9dc9846a49087ef0e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCDC8 | 17656 bytes |
font_02_sfnt_off0000fadd.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFADD | 16792 bytes |
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