PDF malware analysis — malicious · f12b8355c04289e4

MALICIOUS

PDF

70.9 KB Created: 2020-06-03 19:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cb77a4ba538a83b892f09758db2bb471 SHA-1: 6e591e6141e5c2db0691f2ad7db6422fe2aba92f SHA-256: f12b8355c04289e4fc41d424b72171d4d0bc74d21347d1ae4f3d3ea8a9df790a

94 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 domains that appear to be part of a link farm. The ML classifier strongly indicated maliciousness. The primary URL, http://sylmargbla17.com/uploads/1/3/0/3/130313286/130313286.html#stof+chula+vista, is likely the intended destination for users, potentially leading to a phishing or malware distribution site.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small 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.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The 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.
Embedded URL info EMBEDDED_URL

One 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://sylmargbla17.com/uploads/1/3/0/3/130313286/130313286.html#stof+chula+vista
- http://hostmaster.peonygiftsandkitchen.co.uk/uploads/1/3/0/9/130968935/mifavifosiveg.pdf
- http://westdfwmarket.com/uploads/1/3/1/4/131483550/ff1af1ab4a.pdf
- http://palmerallen.net/uploads/1/3/0/5/130540746/xiwikinixod.pdf
- http://highachievers.info/uploads/1/3/1/3/131379709/zotiti.pdf
- http://midnightsunpearls.com/uploads/1/3/0/2/130273581/neganesava.pdf
- http://magussecurity.com/uploads/1/3/1/6/131636845/godedigejati-tosojoluwex-tagijafizipij.pdf
- http://ssplawfirmllc.com/uploads/1/3/0/3/130379342/486427.pdf
- http://sylmargbla17.com/uploads/1/3/0/3/130313286/terms.html
- http://sylmargbla17.com/uploads/1/3/0/3/130313286/dmca.html
- http://sylmargbla17.com/uploads/1/3/0/3/130313286/policy.html
- https://kodelemepopi.files.wordpress.com/2020/05/romedizamupiravuwazawizax.pdf
- https://lavisegiz.files.wordpress.com/2020/05/69837720692.pdf
- https://zujogoroni.files.wordpress.com/2020/05/pabunugilanudej.pdf
- https://vugikokawu.files.wordpress.com/2020/06/23586760013.pdf
- https://vuvobifo.files.wordpress.com/2020/06/59226440107.pdf
- https://litigida337585241.files.wordpress.com/2020/06/xotozawef.pdf
- https://gelepulag632881419.files.wordpress.com/2020/06/xujele.pdf
- https://gugotuka.files.wordpress.com/2020/06/zokokuwim.pdf
- https://linapejurax.files.wordpress.com/2020/06/63137565922.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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eb12.bin` `34b1ac6011a0583e025822030651025d56edcd9dea3f3eda6c33eb3c1d92ed29`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB12	10840 bytes

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