Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87f6c6b739dbd99…

MALICIOUS

PDF

44.8 KB Created: 2020-06-21 07:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b07be68a9e055956afb66989a489e47 SHA-1: 106644072bf7dda6ce0335713aebe01ab75e9c79 SHA-256: a87f6c6b739dbd99cb56f40837ec63396f97980f9aa6830193d9bff6246f85d8
62 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution network. The document body, though containing educational-sounding text, is heavily obfuscated and also contains embedded URLs, reinforcing the malicious intent. No scripts were extracted, limiting the analysis of direct payload execution.

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://krattliministries.org/uploads/1/3/0/6/130604808/130604808.html#elementary+energy+lesson+plans
    • http://ns2.paaap.org/uploads/1/3/0/6/130604904/karodomidu_winazuwa_xepudakidu.pdf
    • http://mitmultiservice.com/uploads/1/3/0/5/130540799/boropataxef_xitumavopadol_lapamifixasa_nopivuvefax.pdf
    • http://lawyerfrisco.com/uploads/1/3/0/9/130969473/fikeretomulun-kusimemoke.pdf
    • http://pscables.com/uploads/1/3/0/7/130775643/begose_mumugologiruf_lesaregipusub_wutivumidifegu.pdf
    • http://todays-entrepreneurs.com/uploads/1/3/0/2/130292007/baaa66dae1.pdf
    • http://cpanel.hmcl.hk/uploads/1/3/0/4/130435873/9fb94b234820e44.pdf
    • http://kinfolkphotography.co.nz/uploads/1/3/0/6/130639708/samonamoxuturowod.pdf
    • http://cpcalendars.serenityhobbies.com/uploads/1/3/0/9/130969185/83e91b430f99f0a.pdf
    • http://paccaroindustries.com/uploads/1/3/0/4/130475909/metizud-dokigimulefubup-jezovedul-wadaxa.pdf
    • http://hddunderground.net/uploads/1/3/1/6/131606815/suvojoge.pdf
    • http://global.pafiried.my/uploads/1/3/0/6/130621548/xesoziribobe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007144.bin
501432e411bfb64ddd72a59dc65343945537a99fd5f2a96899191a2fd6a98e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7144 4936 bytes
font_01_sfnt_off000081fb.bin
0c54bbfe47dd62d3f2bdfb27e7bff18d9a24742bf2e606f8508e4f3f8c8dadfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81FB 10944 bytes

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