Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bcd00c328981fef…

MALICIOUS

PDF

34.3 KB Created: 2020-05-21 06:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be2f1555dfedba9506dad8193ae2fd0d SHA-1: 26fa186078c273763c099958cebf3566e6febfcb SHA-256: 5bcd00c328981fef92b87df721cc3e38b071b02a66f4b3bd3cddbe075309beb3
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are structured as a link farm. The primary lure appears to be a 'Roku driver for windows 10' to entice users to click on the embedded URLs. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious websites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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
  • 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 http://socialvaultgroup.com/uploads/1/3/0/6/130621071/130621071.html#roku+driver+for+windows+10
    • http://coachingunited.de/uploads/1/3/0/4/130436197/f0384d3.pdf
    • http://amstalent.com/uploads/1/3/2/3/132302951/vavejiravifapof.pdf
    • http://thenothingman.com/uploads/1/3/0/2/130287991/794498.pdf
    • http://wheresmario.com/uploads/1/3/1/3/131379598/tewanodanuwezesa.pdf
    • http://ibenglishhelper.com/uploads/1/3/0/3/130313193/xoraguwefotaxa.pdf
    • http://prestigecommerciallending.com/uploads/1/3/0/6/130604222/3813376.pdf
    • http://blackdiamondcleans.com/uploads/1/3/1/4/131453329/c758f8e0.pdf
    • http://olneyauctions.com/uploads/1/3/1/4/131452826/fb443d30e.pdf
    • http://thechakrashaman.info/uploads/1/3/1/1/131163920/tetagur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bc7.bin
ef4d86e8a293c0d65b7877b3885e2097ba6c8d1abad49cc74004d49d9b6555de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC7 10100 bytes

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