PDF malware analysis — malicious · d8d9e2ed79bce504

MALICIOUS

PDF

64.0 KB Created: 2021-04-28 03:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 971e495a672c8376ca74f9bc7db60598 SHA-1: 6c0a44a1211feb939816ffdcf96ed95300890547 SHA-256: d8d9e2ed79bce504f3be75fc76bca347f3e2b4bf5ad0229b0326de94ab96a256

64 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to disposable domains, a tactic often used for link farming or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirms the presence of a link farm on disposable hosting. While no scripts were extracted, the overall structure and URL distribution suggest an attempt to manipulate search engine results or distribute further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9610

Heuristics 3

Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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 https://zajinet.ru/strik?utm_term=inkscape+crop+path
- https://cdn-cms.f-static.net/uploads/4489428/normal_605c11d93a723.pdf
- http://numusuri.22web.org/font_aksara_jawa_for_android.pdf
- https://cdn-cms.f-static.net/uploads/4470979/normal_60157f1fbaa29.pdf
- http://pumidafefisun.iblogger.org/amar_chitra_katha_ramayana_free_download.pdf
- https://cdn-cms.f-static.net/uploads/4476416/normal_5fda7c5c4c31b.pdf
- https://cdn-cms.f-static.net/uploads/4486350/normal_601c711129383.pdf
- https://static.s123-cdn-static.com/uploads/4486748/normal_5febb5b394143.pdf
- http://jekeluxuto.mywebcommunity.org/peck_atlas_of_human_anatomy_for_the_artist.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_590c69dd48884463a2153e484da18346.pdf?index=true
- http://putunoxixowelo.atwebpages.com/21563137963.pdf
- http://gerogawotu.rf.gd/bncc_educao_fsica_ensino_mdio.pdf
- https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_8596937e3c364d6185ad90ce9bca6ad6.pdf?index=true
- https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_417eacfc01334de4853f61553df66e92.pdf?index=true
- http://zesafemumibow.myartsonline.com/ansys_tutorial_fluent.pdf
- https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_f0c7c39f94354f83a0a55662200e7d51.pdf?index=true
- https://0a3880f2-9bda-4900-b484-73a003b8a878.filesusr.com/ugd/3cbe5d_bb86db2090ae43e5992bb25e098c17b2.pdf?index=true
- http://zaduzos.myartsonline.com/definition_of_business_research.pdf
- http://wukevivetarapu.myartsonline.com/how_many_dc_rebirth_comics_are_there.pdf
- http://dosibaguluf.epizy.com/the_dip_seth_godin_free_ebook.pdf
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f238.bin` `da8a68712ec3a52163bc7367365f7e3c0eddfa5f44fc1f5545a8efe5c769c643`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF238	4732 bytes

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