PDF malware analysis — malicious · 6fb60bc33e264555

MALICIOUS

PDF

47.9 KB Created: 2020-10-27 05:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 6fe3478fad8fc740b83115a126341827 SHA-1: 0e691a49cfb861d24ec43f441c57c73298aac6c1 SHA-256: 6fb60bc33e264555b3d4248a7e12f46f4c671230681d907708d0fd6e2620b8d2

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence point towards a malicious intent to redirect users to harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://cctraff.ru/wb?keyword=laser%20beam%20machining%20working%20principle%20pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4366993/normal_5f873a6b82ec1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365613/normal_5f89829e4e8f5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380088/normal_5f91040656ba9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368218/normal_5f89430e2574b.pdfIn PDF document text
- https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/nigekexetazid-zojivavikexut-jupuborux-toxivizonalivam.pdfIn PDF document text
- https://kerumesuni.weebly.com/uploads/1/3/4/1/134131613/972878.pdfIn PDF document text
- https://nagigezivozitos.weebly.com/uploads/1/3/4/3/134340852/e81705e0.pdfIn PDF document text
- https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/02668db53e6bd.pdfIn PDF document text
- https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/1808c.pdfIn PDF document text
- https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/juvonumed.pdfIn PDF document text
- https://jegupifak.weebly.com/uploads/1/3/4/0/134018348/500b92fe3662f.pdfIn PDF document text
- https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
- https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/vivorag-mufebixateto.pdfIn PDF document text
- https://zefubolinela.weebly.com/uploads/1/3/4/3/134318842/9824949.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/subud/estadistica_descriptiva_probabilidad_e_inferencia.pdfIn PDF document text
- https://s3.amazonaws.com/zosevid/tusojajani.pdfIn PDF document text
- https://s3.amazonaws.com/dogazisuze/indian_business_case_studies.pdfIn PDF document text
- https://s3.amazonaws.com/kufazete/pakemaxonujuganagogi.pdfIn PDF document text
- https://s3.amazonaws.com/fosagobomap/aprendizado_de_mquina_python.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5e672e91-8881-4e92-951c-ce1773e9d215/bifuxunobexolamepuzax.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fea89570-5b4c-4313-9a65-d68c4f9e99a7/korebiwavosesi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/79f41ae2-fc9e-4657-a060-d507b08c1578/fizomaziz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/221df30e-bb05-438e-a0b3-52272aa30c2f/24561757380.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/991e26f2-8473-4d22-bb76-650347ca5c0e/zeluruvamubujetulunu.pdfIn PDF document text
- https://s3.amazonaws.com/jojitagifuva/suzudoguk.pdfIn PDF document text
- https://s3.amazonaws.com/zarelusipofox/91834624576.pdfIn PDF document text
- https://s3.amazonaws.com/retobifulipo/fodutagoxafogolanag.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007a34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A34	5808 bytes
SHA-256: `0110c36ffcd8ad84fa157705614a8d44e637535ec9636331501b038020c106e9`
`font_01_sfnt_off00008ddf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DDF	10612 bytes
SHA-256: `54d64094a640f91428624871ec2819e9d40f40895e7a8726f3137cd41fa63248`

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