MALICIOUS
206
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The document body, though heavily obfuscated, appears to be a lure related to a search function, likely intended to trick users into clicking the embedded URLs.
Machine Learning
- Nyx PDF Classifier malicious score 0.9961
Heuristics 7
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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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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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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QR-code redirect lure medium SE_QR_LUREDocument instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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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://zajinet.ru/strik?utm_term=how+to+do+a+global+search+on+ipad+home+screen
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- https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_651f4374de604b2ebce41b853334c7b6.pdf?index=true
- https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_525a98e7b94040ca9b3a06fceec3ed29.pdf?index=true
- https://761e60ea-5e0e-4c43-b4c2-f6a9045c608d.filesusr.com/ugd/545033_98265f16621946f388a6c13ac1b6a0ed.pdf?index=true
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- http://jujobope.atwebpages.com/tuwunadi.pdf
- https://7c3a386c-9197-44ff-a2a0-26a6be1b6260.filesusr.com/ugd/bba797_a9b98e6789e74f7c9c1bea53534d03db.pdf?index=true
- https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_353319d16af448cdb51077e896c4eab2.pdf?index=true
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- http://www.w3.org/1999/02/22-rdf-syntax-ns#
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Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0001c89a.bin8a9f2f08749a527f24a4332e53bfdb82fe38cfb9e0c876e073edc1d580282c37 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1C89A | 5680 bytes |
font_01_sfnt_off0001dbcd.binf45da2af1e02b56c418b534fcf1847068793d43dd2f56f7a9e5f55e60920e275 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1DBCD | 12372 bytes |
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