Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2d24ab1af8e678…

MALICIOUS

PDF

34.0 KB Created: 2020-04-05 14:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 51760832e1efe0893916a97eaa32d9b2 SHA-1: e113e025674a2d614d39f8bbb0c6856ed1a321d0 SHA-256: 7d2d24ab1af8e678a3ca959d6167df427f5fcd766377ded47c01fb086dda67e1
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files on different domains. This pattern is indicative of a link farm designed to manipulate search engine results or distribute malicious content. The document body contains a title related to a diagnostic math exam, likely a lure to encourage clicks on the embedded links. No scripts were extracted, and the primary malicious behavior observed is the redirection to a network of potentially malicious URLs.

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://boholavie.com/uploads/1/3/0/7/130776260/130776260.html#examen+diagnostico+de+matematicas+para+quinto+grado
    • http://tacaccountants.com/uploads/1/3/0/7/130776147/7831087.pdf
    • http://los-rebeldes.org/uploads/1/3/0/9/130969529/057ecd.pdf
    • http://gravelinelandscaping.com/uploads/1/3/0/5/130540021/1052450.pdf
    • http://edureacheducation.org/uploads/1/3/0/4/130483886/b3bb8e7d5c99f2.pdf
    • http://costaricapremiumrealtors.com/uploads/1/3/0/8/130874583/9d2c69.pdf
    • http://inrusdeco.com/uploads/1/3/0/6/130621503/sivexote-dinebatevugi.pdf
    • http://shetlanddesigner.com/uploads/1/3/1/3/131378899/bibomuxax.pdf
    • http://themavery.com/uploads/1/3/0/4/130436181/7596352.pdf
    • http://businesscreator.net/uploads/1/3/0/2/130274345/c75d5f644c7d992.pdf
    • http://fitfritz.com/uploads/1/3/1/4/131407592/bf89497b40.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_off00005d8f.bin
9c22a066b0d1b034d3016559a640f0dd0801682a1719129d2be6a4b6a56f9da6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8F 7972 bytes

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