Malicious PDF — malware analysis report

Static analysis result for SHA-256 503e236045e6aa69…

MALICIOUS

PDF

45.5 KB Created: 2020-04-19 19:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a5d66b2fa07155f34a497c0829ee3d46 SHA-1: 919eced0a4e0f2ad7e2a79c0fedc5cc9fde07446 SHA-256: 503e236045e6aa69d2fe742e283ebd303cd38812c5f5e43ee7a9179c0fc542ec
70 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files with numeric slugs, indicative of a link farm or SEO abuse. The document body, though partially corrupted, contains text suggesting it is an 'app landing page template', which serves as a lure. The presence of numerous unknown reputation URLs strongly suggests a malicious intent to redirect users to potentially harmful content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dogtoysbook.com/uploads/1/3/0/4/130435848/130435848.html#app+landing+page+template+wordpress+free
    • http://secondhandsistersstuff.com/uploads/1/3/0/7/130775628/1165150.pdf
    • http://totaleclipsewindowtinting.com/uploads/1/3/0/9/130969806/ad094.pdf
    • http://trumarkmaintenance.com/uploads/1/3/0/7/130776328/mejesixonepi.pdf
    • http://bizandjohn.com/uploads/1/3/1/3/131398159/6652350.pdf
    • http://triosimplant.com/uploads/1/3/0/5/130547659/4118315.pdf
    • http://kaylieleclercphotos.com/uploads/1/3/0/4/130483200/1646810.pdf
    • http://bookieinspires.com/uploads/1/3/0/6/130620464/girimudulom.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c0e.bin
2cb908a7dade7be44db30543e0a37fea26f98b2130a0c1457ceb6a288368bbd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0E 7860 bytes

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