Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46dc467c7b9e82e…

MALICIOUS

PDF

46.0 KB Created: 2020-11-05 10:22:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7a3f31fe8053f2bd56ed36608ee0c2fd SHA-1: 252f70b0b704271275aa13a4cd22618d063e75b5 SHA-256: d46dc467c7b9e82ef214c9f607dd0a5cdec28bc3f6d2fa506b75ab0da2e971ca
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xumabilere.weebly.com/uploads/1/3/1/1/131163638/b60ce.pdf.
  • 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/strik?keyword=pokemon+go+spoofer+ban In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5fa06c003adb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389095/normal_5f972c9283af3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f9a339ad04c9.pdfIn PDF document text
    • https://xumabilere.weebly.com/uploads/1/3/1/1/131163638/b60ce.pdfIn PDF document text
    • https://nirilixurem.weebly.com/uploads/1/3/4/4/134474770/5634917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407991/normal_5f9a66d4797e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416786/normal_5f9cac85753d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5f94374be64ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f9a8ceae6bcc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0f7f0434-1b13-4beb-804f-dd3e12f34a6c/98262718245.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/wawizurovexaxarogexuzim.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/73548895143.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/79369545230.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/23732026286.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/91637677181.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000671f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671F 5052 bytes
SHA-256: 46cd87aa8ae21bf378d7d25624196c702d9f743ac8e9bda461f464b631d72b85
font_01_sfnt_off0000782a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782A 11012 bytes
SHA-256: 3eb73ddf1790cd1b136fb12b22a758efd593422005927ee81a4f3d03b67b38a3
font_02_sfnt_off00009d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D08 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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