PDF malware analysis — malicious · 381b0eb6ff31f833

MALICIOUS

PDF

39.3 KB Created: 2020-11-05 22:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01

MD5: 42f50c0690b3151f1d4ab705ad8bb50d SHA-1: e6010dc98f1366aba1dd8d7ea34fc1c792dba0d0 SHA-256: 381b0eb6ff31f83360f13084efc0e4e7bc72c1ea9edcc9a4ca6b7986db351198

134 Risk Score

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://traffking.ru/strik?keyword=in+applying+the+reasonable+basis+test+courts In PDF document text
- https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/e48f942.pdfIn PDF document text
- https://zavebunerug.weebly.com/uploads/1/3/4/3/134358754/2056736.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390999/normal_5f9e2e2471407.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369665/normal_5f89528822584.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381730/normal_5f8e442f7dc1e.pdfIn PDF document text
- https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/6134453.pdfIn PDF document text
- https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/ec1f0f3c347fa.pdfIn PDF document text
- https://juporolo.weebly.com/uploads/1/3/1/3/131380745/6226687.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/970a7717-96ce-4948-a2ff-613f27edf2bb/fakimelul.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_off00005bd6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5BD6	5376 bytes
SHA-256: `f8e84da6c08113f6b16f321f14ccf3b89706fb3df3c186daa5d9d948e5fb3fdf`
`font_01_sfnt_off00006e1d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E1D	10180 bytes
SHA-256: `01f72cbd23038da2ba213d52e3542454b2d5f93426ec47284a294dd577f634d3`

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