PDF malware analysis — malicious · 6c450cff33743f9c

MALICIOUS

PDF

42.7 KB Created: 2020-04-19 08:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 8054c1da4277494b6cd3c16157fb08fb SHA-1: 39374c30a98209882c4d731fc4c38a26dcd3ad8d SHA-256: 6c450cff33743f9ce386d786f715d18605dea11db07ba5530129ae51450122d9

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDFs hosted on similarly generic domains. The ML classifier strongly flagged this PDF as malicious. The embedded document body, though heavily obfuscated, contains a URL that is also present in the heuristics, suggesting a link farm or redirection scheme designed to lead users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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://thomspongaydenreunion.com/uploads/1/3/0/7/130776316/130776316.html#national+paint+product+data+sheet
- http://smithshomedevelopment.com/uploads/1/3/0/7/130775826/vutuvovumijumamofa.pdf
- http://allenssnowremoval.com/uploads/1/3/0/6/130604191/waxipufaredopowesev.pdf
- http://bridgetrafferty.com/uploads/1/3/1/4/131452785/nagip_wirajikutokob.pdf
- http://gloriassoupspot.com/uploads/1/3/1/3/131380320/1045613aa07c896.pdf
- http://bududa-lovespells.com/uploads/1/3/0/5/130589362/989229fe0.pdf
- http://susanstlawrence.com/uploads/1/3/0/7/130739633/jufaved-zowiropi-tudevega.pdf
- http://genevievedreizen.com/uploads/1/3/0/8/130813514/2870055.pdf
- http://community4health.info/uploads/1/3/0/7/130775118/1714854.pdf
- http://buswell.ca/uploads/1/3/0/5/130543537/6234045.pdf
- http://fiestaracine.org/uploads/1/3/1/6/131637073/d7b824366.pdf
- http://bigupcommunities.com/uploads/1/3/1/3/131383533/nuwodixazin.pdf
- http://inspirednuclei.com/uploads/1/3/0/2/130272344/pupemumufegowu.pdf
- http://jereobrien.com/uploads/1/3/0/4/130476272/petef.pdf
- http://uretechinc.com/uploads/1/3/0/7/130775644/xedabujofo.pdf
- http://indiepublishing.guru/uploads/1/3/0/6/130620509/kokejerawar-loserolasog-xojuwowegogadej-bepun.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/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006833.bin` `da7e3ec8783c94a4c7715290f3ed3446fd1be7f6d356c4b2cb5e95d8aebede91`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6833	8076 bytes
`font_01_sfnt_off0000876b.bin` `d8fa1d180e0a505d0c2b16a5f695b88c8b58e4db502161fc5572c07a7daa196e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x876B	16488 bytes

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