Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4fb8df931f13fc…

MALICIOUS

PDF

75.3 KB Created: 2020-10-01 15:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 62bb3ee9a7e2778d04d888f5d7580e39 SHA-1: eac747fede4d82fcd08226594a702394e7376215 SHA-256: fe4fb8df931f13fcb7908342980f936106cbd95038394d64116c252bbc86b48f
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, specifically to a URL designed to appear as a search result for lyrics. The ML classifier strongly indicated maliciousness, and the document body, though heavily obfuscated, contains a URL that is also flagged as malicious. This suggests the document is part of a phishing or redirection scheme.

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://gettraff.ru/strik?keyword=chamakam+lyrics+in+tamil+pdf In PDF document text
    • https://site-1037837.mozfiles.com/files/1037837/24938030575.pdfIn PDF document text
    • https://site-1039197.mozfiles.com/files/1039197/64294953365.pdfIn PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/9369767645.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/73328399803.pdfIn PDF document text
    • http://files.cdafun.com/uploads/1/3/0/7/130776558/xupaxutupoz.pdfIn PDF document text
    • http://files.refinedblinds.co.uk/uploads/1/3/2/7/132712333/bonaxetuved_jitodogeki_magesigegeg.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/65451737604.pdfIn PDF document text
    • https://site-1037182.mozfiles.com/files/1037182/88826611504.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/9ad2e54b-f0b6-4cd9-ac63-0fd5dbc168a6/11851309223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d189e1-0882-40e8-9b71-002ecbe74468/zixezakezafasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cee6803-a137-4bbb-9729-acf2739d3044/70503012134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0530e00-4413-444a-a3e9-dbcfa693b0fc/83158864243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a23b316-8576-40e7-9791-544a6d3ed1b9/febidifefum.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_off0000ec7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 5464 bytes
SHA-256: b7c360e280e7f4d70ca99d6e2cbfa636d7ddd991ead37695b32c6d94bd92dbf6
font_01_sfnt_off0000fef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF0 10036 bytes
SHA-256: 066644475d2ffefc7641111d80d6ba0640642e502954227743625ff1c13c885b

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