PDF malware analysis — malicious · c09672e7f6d7c620

MALICIOUS

PDF

80.5 KB Created: 2021-02-27 22:21:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c5616e0227bfc9ea42d31a50bfd18fc8 SHA-1: 52b6d0264f80c86e4906e98734aebea356f6a9fa SHA-256: c09672e7f6d7c620fa8a9d3b00a3e57c394bb834cbd001a13552574d525627ce

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a significant number pointing to unrelated domains, suggesting a link farm or SEO spam tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate an attempt to redirect users to potentially malicious content, likely for phishing or scam purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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 https://botokaw.ru/123?utm_term=how+to+help+teenager+with+anxiety+disorder
- https://static.s123-cdn-static.com/uploads/4462339/normal_5ff6667529e95.pdf
- https://cdn-cms.f-static.net/uploads/4421615/normal_5fe76e753f76f.pdf
- https://cdn.sqhk.co/navozaxezini/c6Cjihe/okay_boomer_meme_compilation.pdf
- https://wirorovikematu.weebly.com/uploads/1/3/1/0/131071137/zojejivuvipopu.pdf
- https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/2a2ba2d2d5.pdf
- https://cdn.sqhk.co/wepenujofow/hjijdRO/97381597859.pdf
- https://gasibikame.weebly.com/uploads/1/3/2/8/132814219/xegexoserafa.pdf
- https://cdn.sqhk.co/vabedesi/fgibij9/kunok.pdf
- https://cdn.sqhk.co/wutalididow/Ygd8GUu/zombie_cubes_free_house.pdf
- https://cdn.sqhk.co/neratimo/jjPgcvl/35824715137.pdf
- http://tedusoxunola.22web.org/jogifaderitazizasuwa.pdf
- https://cdn-cms.f-static.net/uploads/4380695/normal_601d0f4420e5d.pdf
- https://cdn.sqhk.co/ganuniwiku/D85ihif/difference_between_chicken_manure_and_cow_manure.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/fatikonavori/58199365947.pdf
- https://s3.amazonaws.com/bofake/betty_la_fea_2019_transformacion.pdf
- https://s3.amazonaws.com/mosezavor/29506049365.pdf
- http://musezuw.rf.gd/46465167609.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fe51.bin` `ab5945c777772f3d85a1d81fcd9e184824ab6dfc0583c7316cf135eb600d1a82`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE51	5444 bytes
`font_01_sfnt_off000110e0.bin` `c5e8c01b7ffdf90f8e7171a8ae1bf61b1e444646c85ef28ce6d6e25fb0b4235c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110E0	10816 bytes

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