MALICIOUS
94
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, though partially corrupted, includes a URL that points to a page with 'exercicios resolvidos', suggesting a lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent behind the link farm. No scripts were extracted from this sample.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
Heuristics 4
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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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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://aa.undesirable.us/uploads/1/3/0/7/130776405/130776405.html#equa%25C3%25A7%25C3%25A3o+fatorial+exercicios+resolvidos
- http://zumarock.org/uploads/1/3/0/7/130739967/wawebusin.pdf
- http://chatmanvirtualbooktours.com/uploads/1/3/1/4/131483278/7b95cf7d717f9d.pdf
- http://begreatapparel.com/uploads/1/3/0/7/130740053/8830342.pdf
- http://myburialinsurance.com/uploads/1/3/1/8/131871854/wilis.pdf
- http://migromarine.com/uploads/1/3/0/4/130483508/tunawiwebad_lufazu_susomifaladox_dizigidumewerak.pdf
- http://elitepaintingcleaningandmore.com/uploads/1/3/0/5/130589072/sikomaxuwegufin.pdf
- http://paragonsolutionsselect.com/uploads/1/3/0/8/130813899/lirewurorenamugabak.pdf
- http://3577productions.com/uploads/1/3/1/3/131382693/1551866.pdf
- http://74-123-73-221.mgwnet.com/uploads/1/3/1/6/131636833/vuromifob_nigajomoxune_gifubasufu_xuwenufulorekil.pdf
- http://billy-nelson.com/uploads/1/3/0/3/130313107/1ce1c1ce.pdf
- http://hanamakeup.studio/uploads/1/3/1/4/131455956/leposotilirem.pdf
- https://gomepimus.files.wordpress.com/2020/06/11493410632.pdf
- https://zomoxazira.files.wordpress.com/2020/06/80121647186.pdf
- https://zijumaxiwigu.files.wordpress.com/2020/06/47872479862.pdf
- https://derexomej.files.wordpress.com/2020/06/lutavave.pdf
- https://mumomajolope.files.wordpress.com/2020/06/48934037661.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/
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000664e.bine24fa3f9371708e176a9973c36b5328fdc4b8b7a280e6229387aa9fc766172de |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x664E | 12328 bytes |
font_01_sfnt_off00008d02.bin3bb08857b08983a257d5a2052628e18542fd51c8d29f5bbef87ea8b8ace00841 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8D02 | 16096 bytes |
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