Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9288c50b4949e5f…

MALICIOUS

PDF

52.6 KB Created: 2020-06-05 23:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c2b32dc66d70707cc0ed2423f947b33 SHA-1: 38e2b6a43a2efe3808aac7c9a804dd26df9a5f2a SHA-256: a9288c50b4949e5fd0d35896529ab7ecc9e11ebd975625646b189b6a2fdb0023
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains references to URLs that are also present in the list of extracted URLs. These URLs point to various domains and likely serve as a link farm, potentially for SEO manipulation or to distribute further malicious content. 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://garysstorage.com/uploads/1/3/0/9/130968921/130968921.html#segunda+ley+de+la+termodinamica+ejercicios+resueltos
    • http://americanmuffalo.com/uploads/1/3/2/3/132302872/cbe367f2.pdf
    • http://velvetbathtime.com/uploads/1/3/0/2/130272325/kapibomidip_tetomipokibe.pdf
    • http://webdisk.greenmountaintreats.com/uploads/1/3/0/5/130590257/jidolebewaga-xileborekigoduk-puzitixogom.pdf
    • http://monabadawy.net/uploads/1/3/1/8/131859613/ladivuvubader_jumukiwo_xulunoze_varowalik.pdf
    • http://rongeskeyjr.com/uploads/1/3/0/2/130287257/9f61c0e6582a.pdf
    • http://viewyoursite.info/uploads/1/3/1/6/131606638/4862762.pdf
    • http://sarahpoulgrain.com/uploads/1/3/0/3/130379435/gunanol.pdf
    • http://trinityworshipcenter.net/uploads/1/3/1/4/131407797/sivazajafun.pdf
    • http://thecurrentcafe.com/uploads/1/3/0/7/130776415/sokuga.pdf
    • http://vtocmeconf.com/uploads/1/3/1/4/131411147/bda46e0f.pdf
    • http://plumbing-concepts.com/uploads/1/3/0/6/130603936/negutep.pdf
    • http://garysstorage.com/uploads/1/3/0/9/130968921/terms.html
    • http://garysstorage.com/uploads/1/3/0/9/130968921/dmca.html
    • http://garysstorage.com/uploads/1/3/0/9/130968921/policy.html
    • https://woxuriro.files.wordpress.com/2020/06/jaloriwemilapugenew.pdf
    • https://zixipitamefi.files.wordpress.com/2020/06/xumebiziloto.pdf
    • https://juxudilopi.files.wordpress.com/2020/06/43422201102.pdf
    • https://zaxidelodawa.files.wordpress.com/2020/06/fesoviwakovurus.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_off00007a59.bin
8085e85f7ab2ec424f2d1e8603e5adaf13eeac0702cda241d6a7218dd8b8c71c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A59 2484 bytes
font_01_sfnt_off000084fb.bin
1238ad5777cad8be3417bb6e2a4b14ae87515ff95e34596645aaf3144f3dd85b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84FB 12464 bytes
font_02_sfnt_off0000adf9.bin
2ec471bc1dd097ba7445d0d98fae4076614f7d308a936bf5c28a382db3fe60d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADF9 16304 bytes

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