Malicious PDF — malware analysis report

Static analysis result for SHA-256 0267aa97a0a50b42…

MALICIOUS

PDF

42.5 KB Created: 2020-10-12 08:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1027f780632fad3867d8e50788f1ccd6 SHA-1: e18a29db45f55bef5b771992ddca0f084745395a SHA-256: 0267aa97a0a50b42cd1eee17e4da96f9d331398962b37d777cfbaf678cc7614b
154 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 text, though garbled, contains a URL that appears to be a lure for free books, suggesting a phishing or scam attempt. The PDF_SEO_LINK_FARM heuristic indicates the document is part of a larger link farm, likely for SEO manipulation or distributing malicious content.

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=biblia+gratis+por+correo+postal In PDF document text
    • https://site-1039806.mozfiles.com/files/1039806/30670641199.pdfIn PDF document text
    • https://site-1037175.mozfiles.com/files/1037175/4634291246.pdfIn PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/jupuxixo.pdfIn PDF document text
    • http://besilekij.uniquebreedgoaltending.com/uploads/1/3/2/3/132303382/cf64161fa4e1.pdfIn PDF document text
    • http://files.mrsmilewski.com/uploads/1/3/1/3/131398591/kepifizagev_jabolifedo_lidifudonano_fegiponukopu.pdfIn PDF document text
    • http://rovekoven.rbpaintcompany.com/uploads/1/3/1/4/131438684/4dd4784.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/cd4b9b11-0dbd-4ca1-b456-87697911ce5e/zesobifuwurorirej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c2d054a-6b3d-445a-8df9-1b993d68860c/17499975324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c98204-4133-4793-9bbf-2200f0209ebb/69404784476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c700c601-0cfc-4220-acee-ef87a4f7e5a6/fipuxafelewogosivobun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e11b283-265e-4bb3-beba-43b0596fc257/buxonagotuwuzobikumaxugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/419b6f35-e6e6-437c-a6ad-99d668a253a7/80438055947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b30d12d-2720-4c6f-ba9a-bafbfcc614f4/5910014208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6005194-4cf9-4c7d-bcc2-9ada5220d5d3/13601605939.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_off0000637d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637D 5292 bytes
SHA-256: 3d245e3bc9351e1ea4e78dafafb8e2e436f199e9053290a90af5d3d36572e1dd
font_01_sfnt_off00007577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7577 11820 bytes
SHA-256: 25f3731208ef969af7f103c2e8f2871edcef6643413ce4bbdf9340a17edbb03e

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