Malicious PDF — malware analysis report

Static analysis result for SHA-256 f98f70258bc23456…

MALICIOUS

PDF

99.7 KB Created: 2020-05-29 22:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ed7601f390102097723f26d7c1b54b3 SHA-1: 15bb83a67e00889e100e6ce15f165bcadac70b6a SHA-256: f98f70258bc23456a81fc2183d27dfa8af6a25c34a395ab3283befe9d889d919
70 Risk Score

Malware Insights

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

The PDF file contains multiple external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though heavily obfuscated, contains text suggesting a lure for a 'free praxis study guide'. The presence of a 'visual download / call-to-action button lure' heuristic further supports this. The primary malicious URLs identified are part of a link farm, likely serving as a distribution point for further malicious 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://mail.finnandbuffy.com/uploads/1/3/0/7/130739210/130739210.html#free+praxis+study+guide
    • http://mx.tidaldrumworks.com/uploads/1/3/0/6/130621131/3424139.pdf
    • http://nevrapoint.com/uploads/1/3/0/4/130488332/0bca86c66.pdf
    • http://hostorchestra.com/uploads/1/3/1/3/131383594/2721515.pdf
    • http://weighlesseasymeals.com/uploads/1/3/0/9/130970012/184460.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_off00015b78.bin
1690cd9850f10e0dd7e232a936971a2aa9e9009a5758cade6385d5728b75939b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B78 11980 bytes

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