Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b73bcca7d700203…

MALICIOUS

PDF

41.4 KB Created: 2020-04-16 00:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bccba515a19266faa3ea5b9302a49ff5 SHA-1: b951aa4eeb947c0cbae35e06dd4cfbe08baf97ce SHA-256: 3b73bcca7d700203d5a84f786e0eb2128c94e8a4aefe24a1bca6934b28733fec
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of external links, many of which are structured in a way that suggests SEO spam or a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, and 'SE_LOLBIN_RUN_COMMAND' suggests that the document may contain instructions for executing commands, potentially to facilitate further malicious activity. The primary lure appears to be 'Ed sheeran perfect duet sheet music', aiming to attract users interested in music.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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://growmygardens.com/uploads/1/3/0/5/130590339/130590339.html#ed+sheeran+perfect+duet+sheet+music
    • http://finefurnitureco.com/uploads/1/3/0/7/130740191/pefotuvi-ginamomas-valonebajura-jebekosenabugaw.pdf
    • http://sumitsakhuja.com/uploads/1/3/0/8/130874639/85639f2e8a4c9df.pdf
    • http://oosterhuisphotography.com/uploads/1/3/0/7/130776558/7252f8c442c1f27.pdf
    • http://greenelectrical.org/uploads/1/3/1/4/131453598/5715451.pdf
    • http://riseuptck.com/uploads/1/3/0/7/130738861/57331f2004c.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_off00007886.bin
4b438c41fff315b6dde8d9209327dbbef35f52e2f7a000cc79fc78032d5e7da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7886 9128 bytes

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