PDF malware analysis — malicious · ba4fddbefc3a3212

MALICIOUS

PDF

34.1 KB Created: 2020-03-30 02:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 2e0bbb2430ff99983f2f19a25f7a8104 SHA-1: 13eb6ed50d79dcceae82cab62fc966f935e48693 SHA-256: ba4fddbefc3a3212687b4eaa227aa0b8b7113f0055df11ae1203f9bbb4455b40

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs supports this assessment. No scripts were extracted from this sample.

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://74-123-76-197.mgwnet.com/uploads/1/3/0/3/130380002/130380002.html#righteous+brothers+you+lost+that+loving+feeling+lyrics
- http://kailadraytonphotography.com/uploads/1/3/0/7/130738989/91eb7c9be06b1c.pdf
- http://webdisk.wordwriteshop.com/uploads/1/3/0/4/130436054/lorododowuwal.pdf
- http://thrivewithjessiewhite.com.au/uploads/1/3/0/8/130874451/retikulopafupim.pdf
- http://convergenceab.ca/uploads/1/3/0/7/130775570/dusavogirubu.pdf
- http://thecolonialtheater.org/uploads/1/3/0/6/130604011/dakilik.pdf
- http://www.meganhollstedt.com/uploads/1/3/0/6/130639590/salivalew.pdf
- http://harmoniouslyhenne.com/uploads/1/3/0/2/130289779/larujigabujo.pdf
- http://naileditnorthshore.com/uploads/1/3/0/7/130739772/ralavanovusitadezo.pdf
- http://adriennerempel.com/uploads/1/3/0/6/130604799/wuxat.pdf
- http://wurtullaphysio.com/uploads/1/3/0/4/130477135/wukasupagabugitunesi.pdf
- http://coveinnonnaplesbay.com/uploads/1/3/0/8/130814286/30209f778.pdf
- http://sebastianpilgaard.com/uploads/1/3/0/2/130272102/jimitofupib.pdf
- http://gtctax.com/uploads/1/3/1/3/131380436/kuposevonirob-falujuwo.pdf
- http://heartsgreen.com/uploads/1/3/0/6/130621455/lamupedolezifanali.pdf
- http://hinomotorsnuevaecija.com/uploads/1/3/1/3/131380397/5396991.pdf
- http://hintenbergerplumbing.com/uploads/1/3/0/6/130605447/1418107.pdf
- http://teamdvel.com/uploads/1/3/0/7/130775509/nobirabumad.pdf
- http://creshadavis.com/uploads/1/3/0/7/130776447/taroxezapem.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_off0000618f.bin` `535f10a255e9c19321b97d5c410ee3b1e8a4e1d8a2c5a8e7279eadd284f8c943`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x618F	6220 bytes

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