PDF malware analysis — malicious · 37042f46f91215e6

MALICIOUS

PDF

34.1 KB Created: 2020-11-02 23:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 26d4d9cb2b4117975bb8e76a3df2af3a SHA-1: 77f4b0f70da45b7c9b3c7ccef132f97f0225a61e SHA-256: 37042f46f91215e60035e9503e0efc2f9647b87199dfdd7292de01a37965c1ce

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The embedded document body text, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the presence of a malicious URL strongly indicates a phishing attempt.

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://cctraff.ru/strik?keyword=ccsd+2019-+2020+academic+calendar
- https://cdn-cms.f-static.net/uploads/4374698/normal_5f930e15807ed.pdf
- https://cdn-cms.f-static.net/uploads/4369494/normal_5f97680fec6ad.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/fc537896-6d80-46bf-aa19-614249eb6bd9/91007810978.pdf
- https://s3.amazonaws.com/forupokisip/32900258535.pdf
- https://uploads.strikinglycdn.com/files/93dc35b0-4674-4e5b-94c5-25c831d46758/75056963107.pdf
- https://s3.amazonaws.com/kakef/bevamuvorivavavoxikex.pdf
- https://s3.amazonaws.com/palikuvexake/cancha_de_baloncesto_madrid.pdf
- https://s3.amazonaws.com/potevip/wazawikitotagozidi.pdf
- https://s3.amazonaws.com/xipavir/syllogism_examples_with_venn_diagram.pdf
- https://uploads.strikinglycdn.com/files/eedbbe95-c2d9-4d27-9662-9ec5d3f4924b/49717603782.pdf
- https://uploads.strikinglycdn.com/files/e67b2658-9820-4ccc-9715-535d59032d9b/author_contribution_statement_example.pdf
- https://uploads.strikinglycdn.com/files/34b30186-c18f-4805-88cc-f60a996496fb/87293627376.pdf
- https://s3.amazonaws.com/fufaragebo/royal_dansk_cookies_near_me.pdf
- https://uploads.strikinglycdn.com/files/192e13f9-bc12-4876-9eec-e000bfe3a9f5/32382287289.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_off000046f0.bin` `770f20ffd12264f01f05783865860392fb26f382b17e98636dfa002705dad0b3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x46F0	5504 bytes
`font_01_sfnt_off00005990.bin` `c6dace0eae4b70018d209803db4212c8389f8432e3d5af56f26d0c2f91230309`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5990	10080 bytes

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