Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf4757d6f574022…

MALICIOUS

PDF

37.1 KB Created: 2020-04-06 07:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8e4b0b69bb2c8dca408d6468dfca224f SHA-1: 931b36e026e8b3f7d0625a97411208ad346e6655 SHA-256: 8cf4757d6f57402202c68f4b4ea6680ff62ac36e14570a5324b3281b826c0fec
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named PDFs hosted on various domains. The document body text, though heavily obfuscated, contains a reference to 'Brother mfc-j625dw wifi setup', suggesting a lure to trick users into clicking these links. The heuristic 'PDF_SEO_LINK_FARM' indicates a pattern of creating numerous links to potentially malicious or spam content. The primary IOC is the first external URI found, which also contains a lure related to printer setup.

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://caressofhappiness.com/uploads/1/3/0/6/130620455/130620455.html#brother+mfc-j625dw+wifi+setup
    • http://50klawn.net/uploads/1/3/0/6/130604877/9846057.pdf
    • http://stonefieldcottage.com/uploads/1/3/0/5/130588412/rezufusoxefatudip.pdf
    • http://stefanierothert.com/uploads/1/3/0/5/130590200/zejanetu.pdf
    • http://sparklyhealthandlove.com/uploads/1/3/0/3/130323454/vikaxopimuge_nimef_kalewodewiwab_padipowe.pdf
    • http://canyoncitygrill.com/uploads/1/3/0/2/130289682/8224630.pdf
    • http://mcbcyork.org/uploads/1/3/0/7/130739971/lununanexavulin.pdf
    • http://janicehicks.com/uploads/1/3/0/7/130739061/mutipe.pdf
    • http://sunniecorners.net/uploads/1/3/0/8/130874272/fikene.pdf
    • http://blackfriday.dng.ie/uploads/1/3/0/7/130776152/9132682.pdf
    • http://georginaamyeventcoordination.com/uploads/1/3/1/3/131379312/4180190.pdf
    • http://thegiltwins.com/uploads/1/3/0/5/130589114/784726.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_off000068fc.bin
53c78ac86a88c345592f4a7aac52502d9f6c07e23edb17a0128c363917299040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FC 7856 bytes

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