PDF malware analysis — malicious · 822f9cdc3e41bc39

MALICIOUS

PDF

40.7 KB Created: 2020-11-07 09:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 8c781d30807bad317cfdec4b7c553805 SHA-1: 995a7447e46fa06f3c090804020e7695383a032c SHA-256: 822f9cdc3e41bc39f7a932b622fb1cadc8f3d19dc169af7d1be92c17ea3b0731

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link disguised as a checklist, which redirects to a known malicious domain. The ML classifier strongly indicated maliciousness, and the embedded URL is a primary indicator of a phishing or redirection attempt. No scripts were extracted, but the document's structure and embedded link suggest it's part of a phishing campaign designed to lead users to malicious infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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://gettraff.ru/123?keyword=burns+depression+checklist+scoring+key In PDF document text
- https://cdn-cms.f-static.net/uploads/4407793/normal_5f980f12257bf.pdfIn PDF document text
- https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/8286090.pdfIn PDF document text
- https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/liludesejorina-todiwute-gixexoketi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370089/normal_5f8936940a0ef.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457570/normal_5fa5e1d233f31.pdfIn PDF document text
- https://mufuwavujove.weebly.com/uploads/1/3/4/0/134042856/4127182.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454161/normal_5fa5f4e525d64.pdfIn PDF document text
- https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/5920875c53688b.pdfIn PDF document text
- https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/595097.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416151/normal_5fa20882d9d81.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/dujepav/36463169597.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_off00006157.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6157	5340 bytes
SHA-256: `ce90b625b519a0350b695c16cc366290f3d405e8fe93d97a6e0e9987125a7b8e`
`font_01_sfnt_off0000738a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x738A	10144 bytes
SHA-256: `3afb64575afef69648c093469aa48a92500c58436b9bd9f38abd8124bc497ea8`

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