MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous external URIs pointing to potentially compromised or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this, indicating a pattern of using compromised websites for distribution. No scripts were extracted, but the overall structure and heuristic firings strongly suggest a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9973
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=android+maker+game
- https://www.allduniv.ac.in/ckfinder/userfiles/files/17323422054.pdf
- http://mmdplus.com/userfiles/files/20210905_172054.pdf
- https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/75308000417.pdf
- http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/34881654878.pdf
- https://questyme.com/userfiles/file/82442876592.pdf
- http://fanghsin.com/uploads/files/202109100824188787.pdf
- https://breedlife.com/upload/files/88484648695.pdf
- http://yourbuilding.ru/userfiles/files/ludedorosiwubuduxejo.pdf
- http://swaptoys.org/ckeditor/uploads/files/zopekalipixelujugezege.pdf
- http://knx-shop.ru/admin/ckfinder/userfiles/files/witibidamupofexivaniju.pdf
- https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/rk0vqv45mkkjud5vkdjf1n2ik0/68044235491.pdf
- http://aven.su/userfiles/file/49725244131.pdf
- http://blossomtour.net/FileData/ckfinder/files/20210913_24B15F7D61DA43BD.pdf
- http://innovatepc.com/userfiles/file/gedasuj.pdf
- http://nbnjl.com/userfiles/files/legovofatukizemigusewisu.pdf
- https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613979fc7e637---44723542410.pdf
- https://laser123.com/geektic/files/90753451210.pdf
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/n2hrbrtele2rt6pc3c3pcv3a2q/jidalixasesigepi.pdf
- http://mimarkamilozkartal.com/userfiles/files/dazujojokiwalomomisaxede.pdf
- https://kfk-dekoration.dk/images/uploadedimages/file/ziduxivofuganenimasageb.pdf
- http://xinxinhouseware.com/uploadfile/files/4580199788.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_off0000af3c.bin95d657b433f454cb2f49899483b1a54f182e5204631053a96aa5a23846f0f35f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAF3C | 15468 bytes |
font_01_sfnt_off0000d6a3.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD6A3 | 16792 bytes |
font_02_sfnt_off0000eeba.binced9d6a5bf0d13b79a5370ae3507ba4b82b6d947e82fe79aca801e2b63df0130 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEEBA | 10352 bytes |
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