Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee7e2f86d7e3b5a…

MALICIOUS

PDF

41.6 KB Created: 2020-10-02 00:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b89f91ad2387e4be6bc57fb3273274df SHA-1: 3b32eb53010b3228b845ac675dde48d5b978eddf SHA-256: 0ee7e2f86d7e3b5a851d2e137fba5467d3155894a5e621baa022afb51dae173a
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains URLs that are part of a link farm hosted on disposable domains, suggesting a phishing or redirection scheme. The ML classifier also strongly indicated maliciousness.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=5r55w+transmission+repair+manual+pdf In PDF document text
    • http://files.communityprojectsnapa.com/uploads/1/3/1/4/131483281/nexuwuxugot.pdfIn PDF document text
    • http://jusolax.mattapoisettroadrace.com/uploads/1/3/2/6/132681824/lisemekivef.pdfIn PDF document text
    • http://virab.knockinondoors.com/uploads/1/3/2/7/132712615/7877343.pdfIn PDF document text
    • https://site-1036735.mozfiles.com/files/1036735/87267644044.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/80481317190.pdfIn PDF document text
    • https://site-1038595.mozfiles.com/files/1038595/89033730279.pdfIn PDF document text
    • https://site-1037211.mozfiles.com/files/1037211/65429705183.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/89405896197.pdfIn PDF document text
    • https://site-1038924.mozfiles.com/files/1038924/zobas.pdfIn PDF document text
    • https://site-1036746.mozfiles.com/files/1036746/nedokenugexirosototik.pdfIn PDF document text
    • https://site-1037858.mozfiles.com/files/1037858/gafosipirojozotokurilizor.pdfIn PDF document text
    • https://site-1039809.mozfiles.com/files/1039809/tufiduzatofufawasojoleb.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/995b5bf4-acf7-49fa-881a-c7b950823cf3/morolomukikena.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_off0000657e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657E 5308 bytes
SHA-256: 0e69015a01d48167c39fa594395618218e08dddfea480bc0722f44925bb22d13
font_01_sfnt_off00007788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7788 9932 bytes
SHA-256: 0cfe097a17e73b7b37a61852bdeb4578c6026be4c9be9d38051fd2b2a1579411

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