PDF malware analysis — malicious · f046dae7b993525f

MALICIOUS

PDF

47.1 KB Created: 2020-11-07 11:19:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 4324a7e8d8b6bd0f87ee6823450e937b SHA-1: eb1a2220ada1383d85a3fa108d9d6d1e20744e60 SHA-256: f046dae7b993525fb3705d3dd31b3295ef49c369164bd5b0ff0bf42c2004f641

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, indicating a phishing attempt. The document body, though heavily obfuscated, contains the URL which is likely intended to trick the user into downloading a malicious payload. The ML classifier also strongly flagged this PDF as malicious.

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/123?keyword=optimization+worksheet+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4459060/normal_5fa606c81870e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366645/normal_5f875b9712d59.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387699/normal_5f923e68bd757.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4407102/normal_5f9b566086738.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393036/normal_5fa1b4a77d59e.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/dedinavesute/joker_2019_downloading.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b17d3d14-e770-4a1c-8d19-662d3a41cab5/mcgraw_hill_books_free_download.pdfIn PDF document text
- https://s3.amazonaws.com/gidibesuxi/skyrim_healing_spells_vampire.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/10493955964.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/019d10ec-0585-4a01-b34b-4b54e40724bd/charnela_dorsolumbar.pdfIn PDF document text
- https://s3.amazonaws.com/fizaxo/bafg_formblatt_1_anlage_1.pdfIn PDF document text
- https://s3.amazonaws.com/pusumowi/jirolire.pdfIn PDF document text
- https://s3.amazonaws.com/jaxesabi/83177869043.pdfIn PDF document text
- https://s3.amazonaws.com/wisatutadi/32169672958.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_off000077da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x77DA	5480 bytes
SHA-256: `c052cba5798be8ec2e7366a087f2432a6aca8799d6dc5916ba8cd6201416a546`
`font_01_sfnt_off00008a70.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A70	10828 bytes
SHA-256: `227707f58f8aead62d6d0c1bbe704d3143ca7b79f86a38d5fdfcb09b5fe73a8b`

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