Malicious PDF — malware analysis report

Static analysis result for SHA-256 04bf59190f5f6789…

MALICIOUS

PDF

90.5 KB Created: 2020-12-28 21:23:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: fc18c05787784bb88155f79fb67da288 SHA-1: f804006e7316ecfb5344877c5436a75e290f661d SHA-256: 04bf59190f5f6789ffb2c33df5882bbfa482d5e200041b97e9961656b4df4a67
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (https://cctraff.ru/aws?utm_term=phonetics+and+phonology+linguistics+pdf). The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to linguistics, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=phonetics+and+phonology+linguistics+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f8c4efda0603.pdfIn PDF document text
    • https://pudevadiketimim.weebly.com/uploads/1/3/4/6/134606785/8011053.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427499/normal_5fe3e44fa2693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493873/normal_5fafae4f47dd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487903/normal_5fad8faa165ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/14491465486.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/77633575396.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/32441448468.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/faleborudaxulipoterubulul.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/indian_bridal_makeup_video_mp4.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D04 5424 bytes
SHA-256: 521a48b4e6b685d03b0f0bf79fda3c6e1d9c7544a4381cb159bde5e02bea4b8a
font_01_sfnt_off00011f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8A 12184 bytes
SHA-256: 2e650b4683b5704f5412b2a3be33ed5c3604c64459a46fa158afbb082ae80b55
font_02_sfnt_off00014816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14816 16124 bytes
SHA-256: 532a3c62596bec531a5b3e8a9bc70fa3f1c6a1087f15941c8813ce77e5914556

Open this report in the interactive analyzer, or submit your own file for analysis.