Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad4b8ffcf008232…

MALICIOUS

PDF

51.0 KB Created: 2020-04-07 19:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c0f77f8dd68f3054339218b45546ff61 SHA-1: cef313d76cbd8f22462c36dd624cb268c80ddd02 SHA-256: 8ad4b8ffcf0082325c18c867f6cba6703f90c3a8c81467254f6dcdcd106e6442
92 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier as malicious and contains a significant number of external links, many of which point to other PDF files. This behavior is consistent with a link farm or a distribution mechanism for further malicious content. The document body, though partially corrupted, contains text related to a 'weekly meal planner template', suggesting a lure to entice users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://llunapallussa.org/uploads/1/3/0/8/130815124/130815124.html#weekly+meal+planner+template+free
    • http://yarli13.com/uploads/1/3/0/7/130739225/jomoforasumi_sikixowanu.pdf
    • http://miasfashionmb.com/uploads/1/3/0/3/130323602/mezodozazonaja.pdf
    • http://mhswarriorettes.com/uploads/1/3/0/2/130291531/tuparifuliwosi.pdf
    • http://holisticsolutionsmi.com/uploads/1/3/0/7/130775221/mobaxiz.pdf
    • http://markwilliamstevenson.com/uploads/1/3/0/5/130589205/mezurudasebeju.pdf
    • http://cannabamacbd.com/uploads/1/3/0/8/130874240/wanaxewumisa-zabubegaziteriw.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_off00007fe2.bin
59dd0bf6b013ec41e1b0ba8669230ec4d67f114235972762798c256f6c1b0f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE2 7936 bytes
font_01_sfnt_off00009ead.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EAD 1708 bytes
font_02_sfnt_off0000a714.bin
1d1fa5121415f8f5353993473374918b9d2a38f433752094af4cce5d3be72c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA714 16312 bytes

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