PDF malware analysis — malicious · f4c6a3832d99198d

MALICIOUS

PDF

44.8 KB Created: 2020-06-03 22:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b28ed2cd2e52954cd58d74b241ae3e6c SHA-1: c946052d20af242c9cd99cd6437668f93633d9c3 SHA-256: f4c6a3832d99198d2b3669c8d3d56ed4ad26e5fd6df04b68d4f39db0c80bf46e

92 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO abuse tactic. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a network of potentially malicious or spam-related content through these embedded links.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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
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://mta-sts.mail.ayumikuramae.com/uploads/1/3/2/3/132303248/132303248.html#windows+xp+img+file+for+limbo
- http://wecleanyourspace.com/uploads/1/3/0/3/130313411/49eec05d786.pdf
- http://bradleybaasmathcenter.com/uploads/1/3/0/8/130814411/a49b6dfefaf.pdf
- http://gigawatt-solar.com/uploads/1/3/0/7/130776490/deteloz_bugupigajimejo_wetegazex.pdf
- http://aawphotography.com/uploads/1/3/1/3/131380636/2953038.pdf
- http://mail.ibrahimmorgantourguide.com/uploads/1/3/0/5/130588754/dotive_lugebeviwi_vubadiritubikot_kuzulejulaxo.pdf
- http://jiahaoguojiyulecheng.br3h.com/uploads/1/3/1/3/131383586/3e2d84b.pdf
- http://montanaaussiedoodles.com/uploads/1/3/1/4/131407068/318ea591c17822e.pdf
- http://kellyllee.info/uploads/1/3/0/2/130288301/xovowanofe_sujitopis.pdf
- http://reikihealingbytaryn.com/uploads/1/3/0/5/130550760/vefebofiki_mepikamokamo_xasufow_lidiki.pdf
- http://mta-sts.mail.ayumikuramae.com/uploads/1/3/2/3/132303248/terms.html
- http://mta-sts.mail.ayumikuramae.com/uploads/1/3/2/3/132303248/dmca.html
- http://mta-sts.mail.ayumikuramae.com/uploads/1/3/2/3/132303248/policy.html
- https://demexikil.files.wordpress.com/2020/06/26051888188.pdf
- https://wizuvife.files.wordpress.com/2020/06/delosugunamux.pdf
- https://lagupok392153502.files.wordpress.com/2020/06/11349715037.pdf
- https://sufiwow.files.wordpress.com/2020/06/jovokebiwu.pdf
- https://kuvonalu.files.wordpress.com/2020/06/70018787109.pdf
- https://zemijedo.files.wordpress.com/2020/06/61449934557.pdf
- https://vupujejuwozo.files.wordpress.com/2020/06/buvisesemip.pdf
- https://fusikazisome.files.wordpress.com/2020/06/tedibeneliwetanaja.pdf
- https://linutinoruso.files.wordpress.com/2020/06/jorezaninazotojop.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006324.bin` `98ce60271c7b7e2921eef715336d1e55c14d886091f41cfde21a01740c4bbca6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6324	11204 bytes
`font_01_sfnt_off00008987.bin` `741a85be657c9a161a7aa7d82e6c5ebf876fbeb510d861f1e52d6ce8329690c6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8987	16264 bytes
`font_02_sfnt_off00009edc.bin` `30155f06aedfb79de9f70f3e8e1372addaeb1c7fe56136300e854ed0c3fac0c5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9EDC	1740 bytes

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