MALICIOUS
136
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 point to algorithmically generated URLs on various domains, indicating a link farm or redirection scheme. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains seemingly innocuous text related to 'Stihl 08s specifications' and authoring application details, but the primary malicious activity appears to be the extensive link farm designed to direct users to potentially harmful content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9987
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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PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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://humannaturefoundation.com/uploads/1/3/0/4/130483191/130483191.html#stihl+08s+specifications
- http://equestrianeliteatapplejackfarm.com/uploads/1/3/0/5/130538953/2375429.pdf
- http://shinrinphoto.com/uploads/1/3/0/4/130488816/jufabubetepunim_xudunu_betuze_bewivadiwa.pdf
- http://bowencreativelabs.net/uploads/1/3/0/8/130813546/9326708.pdf
- http://barkdanas.com/uploads/1/3/0/4/130483155/dewegazuwiv_zilevarisijosu_bufup_nazopavig.pdf
- http://myunique.me/uploads/1/3/1/4/131438323/234afd29c4.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
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000668e.bin4cb8b65084c365bf85b08fc953191e551932f1c8e4c0f7d9469df152f6a74f2a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x668E | 7796 bytes |
font_01_sfnt_off000084ee.bind907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x84EE | 2616 bytes |
font_02_sfnt_off00008e22.binf31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8E22 | 16204 bytes |
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