Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ca5d838d387b9f…

MALICIOUS

PDF

51.2 KB Created: 2020-03-11 13:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3d4c3842d33ec15d638579f809ed0337 SHA-1: 33607a4c6a590b75e0a4c03c8b422b656ec274a1 SHA-256: d8ca5d838d387b9f03c9c175d275066ca65c22763b7e4569015311e1b3874036
62 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious content. The heuristic PDF_SEO_LINK_FARM specifically identifies this pattern, indicating the document is part of a link farm. The embedded URLs point to various PDF files on different domains, suggesting a coordinated effort to distribute content or redirect users. No scripts were extracted from this sample.

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://sbobet.lucky1st.com/uploads/1/3/0/2/130291040/130291040.html#propanol+and+acetic+acid+smell
    • http://ibwaa.org/uploads/1/3/0/6/130620746/9a0229.pdf
    • http://stickyearth.net/uploads/1/3/0/2/130289278/nokaxo_talemosika_kadipavekolida.pdf
    • http://entresift.com/uploads/1/3/0/4/130435706/b389a.pdf
    • http://dhshighschool.com/uploads/1/3/0/3/130323585/1181050.pdf
    • http://randimoniumshow.com/uploads/1/3/0/7/130776157/9bd26ca8d.pdf
    • http://beachdelish.net/uploads/1/3/0/6/130621059/afb946a8c327.pdf
    • http://resolien.com/uploads/1/3/0/6/130639212/segin.pdf
    • http://differentlevel91.com/uploads/1/3/0/6/130639764/vokiwexadenuwov.pdf
    • http://sarinabenn.com/uploads/1/3/0/4/130488969/7725019.pdf
    • http://bookweej.net/uploads/1/3/0/6/130604402/gumowomubo-polemikaxi-tufudojizera-renomu.pdf
    • http://scott-enterprises.net/uploads/1/3/0/7/130776769/91e1c6e5d0.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_off00008206.bin
5799fb81e261f6dd50ff9b503e85c44e438542e2bf8c8893756d066a073750d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8206 6496 bytes
font_01_sfnt_off00009201.bin
880719deb885bf46ca77e4b104a61984d1a0dfde0486ffe03b431732b4a6860f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9201 8948 bytes
font_02_sfnt_off0000b434.bin
d53fa48170c4352c3126f3a5b1e0a158fa1e8c68f063f74e113d7c3517d88077		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB434 3060 bytes

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