MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though heavily obfuscated, contains the text "Resolver desigualdades lineales" which appears to be a lure. The primary heuristic identified a "PDF_SEO_LINK_FARM" with a dominant host of mattweise.com, indicating a likely attempt to manipulate search engine results or distribute content from multiple domains. The embedded URLs are the highest priority IOCs.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
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://reboundat.com/uploads/1/3/1/3/131383760/131383760.html#resolver+desigualdades+lineales PDF link annotation
- http://mattweise.com/uploads/1/3/0/2/130272260/4340715.pdfIn PDF document text
- http://freeiigrow.com/uploads/1/3/0/7/130740465/xusaxasufezonir_xeremimoliru_siwira_lobozafabofubum.pdfIn PDF document text
- http://skycloudcity.com/uploads/1/3/0/6/130639205/moxosemive_velizokud_disanam.pdfIn PDF document text
- http://naturalrobotics.net/uploads/1/3/0/7/130739806/vovuliginuberix-momin-ruvotokikujig-mijoviruxewemu.pdfIn PDF document text
- http://sybrcom.com/uploads/1/3/0/4/130483684/6545058.pdfIn PDF document text
- http://millscollisioncenter.com/uploads/1/3/1/1/131163984/lebufagoru.pdfIn PDF document text
- http://3rdgearwaseca.org/uploads/1/3/0/5/130589281/wiwufiju.pdfIn PDF document text
- http://opfutsol.com/uploads/1/3/0/5/130540026/zojibamunoxim.pdfIn PDF document text
- http://chadboswell.com/uploads/1/3/0/5/130588490/rizezezi.pdfIn PDF document text
- http://viperfishproductions.org/uploads/1/3/0/2/130288887/a91b9a9351b.pdfIn PDF document text
- http://chamoisinfo.com/uploads/1/3/0/6/130639493/zafaf.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
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000068f5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x68F5 | 9180 bytes |
SHA-256: 5bb3a944173333eb7c90aad901aa7aa35c4d695c36eb839d4fda76c95c013fe9 |
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