MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing lure. Heuristics indicate it contains a link farm and directs users to external URLs, one of which is associated with a compromised WordPress upload. The 'SE_MFA_LURE' heuristic strongly suggests the intent is to harvest credentials or session tokens by tricking the user into approving a login or providing a one-time code.
Machine Learning
- Nyx PDF Classifier malicious score 0.9981
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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MFA / one-time-code harvesting lure high SE_MFA_LUREDocument asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
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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 https://krisoc.ru/uplcv?utm_term=free+code+robux+card
- https://cpsguffanti.com/uploads/file/8414152384.pdf
- http://klick-tipp.info/ckfinder/userfiles/publics/files/fobujonoposedejaduramitot.pdf
- https://at1apigroup3.com/contents/files/rotakiga.pdf
- https://hotelexpert.ro/uploads/files/52662546507.pdf
- https://sailstudy.in/ckfinder/userfiles/files/jifazitofafutepotakovoguw.pdf
- https://xn--90aweabvm.xn--p1ai/ckfinder/userfiles/files/zowumamarukamuxurikiv.pdf
- http://qianshunqs.com/admin/upload/64751988608.pdf
- http://trunghungplastic.com/luutru/files/66641117349.pdf
- http://tottazo.com/userfiles/file/gaxumejedup.pdf
- http://ropesadventure.com/d/files/55004789965.pdf
- http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6ad45cd00---18162087569.pdf
- https://dveropolis.ru/upload_picture/bobusu.pdf
- http://turchifiltri.com/userfiles/files/sapumofilemogovarite.pdf
- http://ansing.nl/userfiles/file/lagabelolubomedawe.pdf
- https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/2585d5120c9b4939aa50a46de3226748/80065832589.pdf
- https://larrialdiak.es/files/galeria/files/rimeguwuxalerigodig.pdf
- http://iuoooo.com/filespath/files/20210909115025.pdf
- https://kabelkyaobuv.sk/editor_uploads/files/sawazemixilitujurikivad.pdf
- https://corpusbg.com/files/fck/file/87857476502.pdf
- http://gusanhightec.com/userData/board/file/lerefis.pdf
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a8a1b98a4---45429435315.pdf
- http://eternoohydro.com/d/files/nafiwatobuvutakifeloraju.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_off0000d433.bin912cc0298d112801a6e3ce16b6eb501994e0f7951bec8967071d096a094c04fc |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD433 | 10176 bytes |
font_01_sfnt_off0000eb0c.bin989ba1645aa3d188a67bd98a590376a4380118ee0f89de4c92ef2e2497caf25c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEB0C | 17200 bytes |
font_02_sfnt_off00011730.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11730 | 16792 bytes |
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