Malicious PDF — malware analysis report

Static analysis result for SHA-256 f751a338e1fb3e78…

MALICIOUS

PDF

42.4 KB Created: 2020-04-09 20:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9ca60b0b52da55383f2a729fe8bd8621 SHA-1: 407ab38de95ffac41c33cb42262858aca12a8cbc SHA-256: f751a338e1fb3e780a14a1f38103e6bbb9610fb867d41f863b63662854df0b29
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1204.002 Malicious Link

The PDF file contains a high number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The document body includes a deceptive message, 'Mistakes were made but not by me', which, combined with the numerous links, suggests a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://melissascreatablecreations.store/uploads/1/3/1/1/131164355/131164355.html#mistakes+were+made+but+not+by+me
    • http://frankinglett.com/uploads/1/3/1/3/131382141/fozosebekuvag.pdf
    • http://lashhousebar.com/uploads/1/3/0/7/130776168/ruzifa_fusos_vawekemikido.pdf
    • http://buildsolutionz.com/uploads/1/3/0/7/130775554/bisiwuji.pdf
    • http://suttons.us/uploads/1/3/0/9/130969422/xexedakexise_zisugelebib.pdf
    • http://hamapertab.com/uploads/1/3/0/8/130874672/32ffe6abb17f8b.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c12.bin
620fd8b4e258fac3dc02a4e15bf840a58c124fa93f329b2a87a1f4b008c62834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C12 6552 bytes
font_01_sfnt_off00007c35.bin
d9121a104b46307101e20aa159196849045a60d7d6f529c0df618889f5acc510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C35 8520 bytes

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