Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3694d1c025544ad…

MALICIOUS

PDF

42.2 KB Created: 2020-04-09 13:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 57e844f5d820bbf5a76b5284face551f SHA-1: a261c5ed0d1eb78b6f4df41b0b8ef94116068b22 SHA-256: d3694d1c025544ad065b8eb88317ae755bc2e059a7410f3a9e12481f0ad3e50b
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. The document body, though partially corrupted, contains the phrase 'Crucigrama de antonimos' (Crossword of antonyms), suggesting a lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a high volume of outbound links, a common tactic for SEO poisoning or distributing malicious content. No scripts were extracted, but the numerous external URLs are the primary indicators of malicious intent.

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://seabrightluxurywaterfront.com/uploads/1/3/0/3/130312983/130312983.html#crucigrama+de+antonimos
    • http://mustaren-farmarik.sk/uploads/1/3/0/7/130775979/1804144.pdf
    • http://insurance-confidante.com/uploads/1/3/0/6/130604923/gememum-gatepelesowikod.pdf
    • http://iesrichmond.org/uploads/1/3/0/5/130546538/pikipuzabisugidi.pdf
    • http://thehuroncollective.com/uploads/1/3/0/6/130621554/ed39a6085c33.pdf
    • http://yogawithliberty.com/uploads/1/3/1/3/131398453/zevadenis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d26.bin
74b4e3435d541941365c0fa94732035b913ab8639437d280a7077b59726db1f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D26 8436 bytes
font_01_sfnt_off00007c38.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C38 2652 bytes
font_02_sfnt_off000085a1.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A1 16036 bytes

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