MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The heuristic PDF_SEO_LINK_FARM specifically flagged this behavior. The document body, though partially corrupted, contains a title related to medical symptoms and also includes the URLs, suggesting a lure to external content. The ML classifier also strongly indicated maliciousness.
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://wcd-1199sab5.mgh-r.ch/uploads/1/3/0/4/130483582/130483582.html#signs+and+symptoms+of+rheumatic+fever+in+adults PDF link annotation
- http://tomczykfamily.com/uploads/1/3/0/6/130603979/lipereror.pdfIn PDF document text
- http://www.promotenyc.org/uploads/1/3/0/4/130488198/pogeleviw.pdfIn PDF document text
- http://www.bestpromise.org/uploads/1/3/0/6/130621383/tafunaviterepet.pdfIn PDF document text
- http://softwarehabits.org/uploads/1/3/0/2/130289679/lifixegugu.pdfIn PDF document text
- http://tbcomputerstudiosllc.com/uploads/1/3/0/8/130814200/8995593.pdfIn PDF document text
- http://heavenlydao.com/uploads/1/3/0/6/130604531/276f54a.pdfIn PDF document text
- http://idealrustics.com/uploads/1/3/0/4/130476628/151384.pdfIn PDF document text
- http://school-playgroundequipment.com/uploads/1/3/0/8/130873843/d99f159.pdfIn PDF document text
- http://pc101.dadgifts.us/uploads/1/3/0/9/130969131/2882366.pdfIn PDF document text
- http://kontrabecki.info/uploads/1/3/0/4/130488924/5294344.pdfIn PDF document text
- http://healthydiet4you.com/uploads/1/3/0/2/130272356/4428583.pdfIn PDF document text
- http://weldersunion.org/uploads/1/3/0/4/130489523/zefeduvekibili.pdfIn PDF document text
- http://hostmaster.dezi-mal.de/uploads/1/3/0/8/130814933/mukefixitoviba.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_off000072e3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x72E3 | 7736 bytes |
SHA-256: a1442c3c5f575404eba54cc339cc7a715a13030b17af7bc092141cfa3333d932 |
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