MALICIOUS
136
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF document exhibits characteristics of a link farm or phishing lure, containing numerous embedded URLs pointing to suspicious domains. The ML classifier strongly indicated maliciousness, and heuristics identified a mass external PDF link farm and suspicious invisible links. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to further malicious content or credential harvesting.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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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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Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LUREPDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
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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 http://mta-sts.jhigh18.com/uploads/1/3/0/6/130621832/130621832.html#matlab+neural+network+xor+example
- http://aznursingresources.com/uploads/1/3/0/5/130543052/5147642.pdf
- http://office-ssl-secure-management-portal-8d093184ceb1a5718fe6.online/uploads/1/3/0/8/130813448/a97fa1926.pdf
- http://nqxr.com.au/uploads/1/3/0/5/130551341/6764041.pdf
- http://blockchaintradingllc.com/uploads/1/3/0/6/130604203/2093480.pdf
- http://thecloudmen.com/uploads/1/3/0/4/130483279/8275129.pdf
- http://adriancc.org/uploads/1/3/0/4/130435712/8143507.pdf
- http://stellarosemarywalling.com/uploads/1/3/0/5/130550882/garitubudal.pdf
- http://xingkongqipaiguanwang.br3h.com/uploads/1/3/0/8/130874482/054603af6596.pdf
- http://mail.exhibitsourceinc.com/uploads/1/3/0/6/130639024/4611822.pdf
- http://crownprosperityllc.com/uploads/1/3/0/5/130589331/divutoxu.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- 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/
- https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00008b00.bin8d67afc02a8083452a9995dfc131a85e6243f304ab0f66e94ea133fd70d352c6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8B00 | 9524 bytes |
font_01_sfnt_off0000af21.bin009232a8a09263d45ea36fd54c3e95152ea0c2e67ff8d286fb1346050b5b482a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAF21 | 2920 bytes |
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