Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2929d4eed68616…

MALICIOUS

PDF

42.0 KB Created: 2020-11-02 16:51:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1ed4ab355b1575c43759e1dafa26efb2 SHA-1: b94d33baedb70a23d84149e6c1fb409479ecd5a5 SHA-256: 2e2929d4eed6861681fcbf99b4f2d9a1b2ed5774327da7cefc4a3890babf276a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL and other links that appear to be part of a link farm or SEO spam campaign. No scripts were extracted, but the presence of malicious links suggests an attempt to redirect the user to a compromised or malicious site.

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/strik?keyword=inner+healing+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_5f8c95166a874.pdfIn PDF document text
    • https://fexifeter.weebly.com/uploads/1/3/4/6/134612515/4923700.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/jadowo_zulosunarotuk.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/9f7908f1-362f-471b-a693-d0b219dc04a6/luzikorewimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0241/2446/files/zixofuvakefezokule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc3f893-5bb7-45d1-a31f-2f77a956777b/13264338456.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/79699349335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dae6601-8cf0-4aa6-be08-d71457d02221/40208830522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2416/1704/files/bodefeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/788c43e8-7a78-4663-a882-7c936e6cae4b/fegoxepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/142d4ebd-da04-4dd1-853b-e4e7d83a7c64/wufepipupetukakenudupedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb6ae11-5e39-4ccf-be7c-a76e3a1b7003/maniac_magee_the_movie_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab07e4d8-803c-4297-9851-bfa5a36e7dc2/jefef.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.

FilenameKindSourceSize
font_00_sfnt_off0000685f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685F 4860 bytes
SHA-256: 660406c239ed9341c386d7786054df4bd3b73f13d24bce3e5c87812d95401c01
font_01_sfnt_off000078b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B8 10364 bytes
SHA-256: 5706b0dd53079f7ada4c942d4085822c9e285a372b750c897b1d9f85568be323

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