PDF malware analysis — malicious · 8086a6ab862087cf

MALICIOUS

PDF

41.5 KB Created: 2020-06-05 03:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 514b39115de0102bcf2ceab109a85ab1 SHA-1: 979e8bfa1fd38f652e049c14d303762e7125d543 SHA-256: 8086a6ab862087cf5ff34321cb306f662a6063a6756b7d3f081d29d53bf804b7

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, indicating a potential link farm or redirection scheme. The primary heuristic identified a mass of external PDF links, suggesting the document's purpose is to drive traffic to these sites. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

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://mexicomedicalmissions.net/uploads/1/3/0/7/130740387/130740387.html#phalogenics+free+video
- http://beautiistry.com/uploads/1/3/1/0/131069824/nirasopelul.pdf
- http://davyddchong.com/uploads/1/3/1/8/131859993/8635966.pdf
- http://portlobster.org/uploads/1/3/0/6/130640227/kafimerizemanitip.pdf
- http://kalajarvenlomakyla.fi/uploads/1/3/1/4/131437595/320379.pdf
- http://kdlksolutionsgroup.com/uploads/1/3/0/7/130775368/03d2251bfcc7d7.pdf
- http://daisyclaridge.com/uploads/1/3/0/6/130604612/sewobi_xajadeledilaj.pdf
- http://williamyun.com/uploads/1/3/0/4/130483684/muvawokuduw.pdf
- http://dezignsbydarla.com/uploads/1/3/1/3/131381144/5784618.pdf
- http://redmachinesounds.com/uploads/1/3/0/4/130476248/kozumumibakavim.pdf
- http://libraconsultoria.com.br/uploads/1/3/0/9/130969129/tufezoz.pdf
- http://lauraobermeyer.com/uploads/1/3/0/2/130272242/nipaku.pdf
- http://nkrumahgrant.com/uploads/1/3/1/8/131856109/penisuvi-pobametob-migili-woviteg.pdf
- http://mexicomedicalmissions.net/uploads/1/3/0/7/130740387/terms.html
- http://mexicomedicalmissions.net/uploads/1/3/0/7/130740387/dmca.html
- http://mexicomedicalmissions.net/uploads/1/3/0/7/130740387/policy.html
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://faruvuzo.files.wordpress.com/2020/06/45626413293.pdf
- https://vobenixabew.files.wordpress.com/2020/06/52230432747.pdf
- https://jumitedav.files.wordpress.com/2020/06/naputasoseminexokelason.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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000075f4.bin` `3f6a8b2a7fd4dc7c9f553fb7a179895494b0f66ab9ddf3664515e702ec0b99a7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75F4	10636 bytes

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