PDF malware analysis — malicious · 176cbbbb2cc6876d

MALICIOUS

PDF

41.3 KB Created: 2020-03-29 14:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: a94a89e5aa086e43fbf1b5fd2ee1ee7e SHA-1: 1b1da18680d7bf36b1cb77786db63e2c57a8d5fe SHA-256: 176cbbbb2cc6876d760386460a00cd748dd10ba9f3fb3a098c79d59210842cdf

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to external websites, many of which follow a pattern indicative of a link farm or SEO manipulation. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded JavaScript further supports malicious intent. The primary goal appears to be directing users to these external sites, likely for malicious advertising or to host further 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://74-123-76-212.mgwnet.com/uploads/1/3/0/7/130775504/130775504.html#simbolo+w+tabla+periodica
- http://eliskachickadee.com/uploads/1/3/0/9/130969824/woboj.pdf
- http://counselingwithstephanie.com/uploads/1/3/1/3/131380942/21a8b.pdf
- http://biglifecc.com/uploads/1/3/0/5/130539414/zigamesanikiriguwi.pdf
- http://strandlinegallery.uk/uploads/1/3/0/2/130289670/e72af5d9d85.pdf
- http://kingmagnets.com/uploads/1/3/0/4/130436285/zuzoxi-gasaketu-velowiposo.pdf
- http://marccoalition.org/uploads/1/3/0/5/130550708/xodotarifu.pdf
- http://dresseschurch.com/uploads/1/3/0/2/130289570/9442006.pdf
- http://healthypleasuremx.com/uploads/1/3/0/4/130476188/e16041c2455.pdf
- http://insanedips.com/uploads/1/3/0/7/130775372/bonoxodeki.pdf
- http://chris-thayer.com/uploads/1/3/0/7/130776667/xekexulafatoxugabul.pdf
- http://excavatorhydraulicpumps.com/uploads/1/3/1/3/131383893/e76622.pdf
- http://kmlcarpentryllc.com/uploads/1/3/0/5/130590336/5514105.pdf
- http://ladymahia.com/uploads/1/3/1/0/131070306/2de2bf.pdf
- http://thecapecodgeekcon.com/uploads/1/3/0/5/130544437/vegowokid-fuxememoromerak.pdf
- http://airwayf.com/uploads/1/3/0/3/130379169/241f9.pdf
- http://nikosmarinos.com/uploads/1/3/0/5/130550836/vapusasotolutuza.pdf
- http://qualityclassicjewelry.com/uploads/1/3/0/9/130969506/xujizexomup.pdf
- http://therusticarrowpittsburgtx.com/uploads/1/3/0/3/130379051/c53219071a.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_off00007419.bin` `ce361294bebc3e6a24d3966a0574b6941280f6bab486d3c24aa54e61595b997b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7419	9652 bytes

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