Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ccc7d82347980ed…

MALICIOUS

PDF

38.3 KB Created: 2020-10-08 14:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f8e97a51694cadd757d4ed7f99ccff28 SHA-1: 2388670a3ed2055ed777400169933db4287d7132 SHA-256: 8ccc7d82347980ed2f93bd4423df7d26a669bf1a53129bd3160c1fd1a88a1693
124 Risk Score

Malware Insights

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

This PDF file contains embedded URLs that lead to a link farm hosted on disposable domains, ultimately redirecting to a known malicious URL. The ML classifier strongly indicated maliciousness, and the structure suggests an attempt to obscure the final malicious destination. The document body, though heavily obfuscated, contains the primary malicious URL, indicating a likely phishing or scam lure.

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://ggtraff.ru/pify?keyword=southern+colonies+geography In PDF document text
    • https://site-1036886.mozfiles.com/files/1036886/45917507678.pdfIn PDF document text
    • https://site-1038759.mozfiles.com/files/1038759/38791306089.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/bisosuwizafisuda.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/93410190293.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/62773914654.pdfIn PDF document text
    • https://site-1036835.mozfiles.com/files/1036835/visoxesupixufoxejuxis.pdfIn PDF document text
    • https://site-1039465.mozfiles.com/files/1039465/xuxup.pdfIn PDF document text
    • https://site-1038981.mozfiles.com/files/1038981/wixitositedibedirudum.pdfIn PDF document text
    • http://files.hawaiiwaterpolo.com/uploads/1/3/0/8/130874588/funev_memiji_gomojosaxima.pdfIn PDF document text
    • http://files.lakesidefishfarm.com/uploads/1/3/1/3/131381006/wofutokirepemuri.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/eafa13c3-7f87-4afd-b5e3-39bcc17a512b/lemimuzitirox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef7e270-259e-4c19-90ef-b30f6c0dbda1/xiwiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1ed1fe-4409-4249-b1cf-762f466fc101/loguxojiragopam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb95a63-9b21-4566-9cdd-4fdc070b8f6a/monatititenaxo.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_off0000586c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x586C 5400 bytes
SHA-256: 970c96d841f88646d4cf43e343e3739594f9895af42ad9360fad12949b69b97b
font_01_sfnt_off00006acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACD 9688 bytes
SHA-256: 1cd9db77fd2c968a5a08a46952d71fb68b86054dc1c8908094e6331027f7790b

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