MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The presence of numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggests a link farm designed to redirect users to malicious content. The 'SE_INVOICE_LURE' heuristic further supports the phishing pretext, aiming to trick users into clicking these links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9982
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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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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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=please+can+you+confirm+receipt+of+this+email PDF link annotation
- http://skyrybupaslaugos.lt/uploads/files/91141764034.pdfIn PDF document text
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615269d277d3e---vevoferuvata.pdfIn PDF document text
- http://ricarda-allegra.de/userfiles/file/49950062918.pdfIn PDF document text
- https://www.khaosanpools.org/ckfinder/userfiles/files/5096317764.pdfIn PDF document text
- https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615445f4d53b7---duliwilopidurutok.pdfIn PDF document text
- http://yokosohk.com/files/fckfiles/file/53412347288.pdfIn PDF document text
- http://maschimaurizio.it/userfiles/files/56615747394.pdfIn PDF document text
- http://www.urbanwaterways.info/files/kamitufuremikupozi.pdfIn PDF document text
- http://igs.compcierge-asia.com/ckfinder/userfiles/files/1418072624.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/33805831470.pdfIn PDF document text
- http://cuanhuaabshanquoc.vn/files/babamilepatinulabonot.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5c07bb134f345940e930894003ee9bbd/logawuwitopina.pdfIn PDF document text
- http://canoto.us/Images_upload/files/dazosidosevuranuvulaz.pdfIn PDF document text
- https://studiecarriere.it/uploads/file/91100199250.pdfIn PDF document text
- https://totounited.com/contents/files/titazudusej.pdfIn PDF document text
- http://veterina-naslunci.cz/userfiles/file/6895863867.pdfIn PDF document text
- https://gulf-rope.com/images/bulk_images/files/dadisume.pdfIn PDF document text
- https://sasalidayanisma.org/uploads/file/63421739328.pdfIn PDF document text
- https://www.q-jin.ne.jp/ckfinder/userfiles/files/43959264184.pdfIn PDF document text
- http://dragonspond.com/uploads/files/79599408600.pdfIn PDF document text
- http://sva-jeanroze.com/xmedia/file/48459623737.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000f5e3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF5E3 | 10960 bytes |
SHA-256: 241f9a2640990b38ec94ca9fa1eee92806c3706c48f00d88339a3c7c16c0bf5d |
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font_01_sfnt_off00010f2f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10F2F | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00012741.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12741 | 22412 bytes |
SHA-256: 7ac1d18e0e9a651cccf92e98a42b523d1fce9559937fce019aba75768f5338b6 |
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