Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9af30bee0df7c59…

MALICIOUS

PDF

46.8 KB Created: 2020-06-02 04:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc8c4cbe39d4924aafdf7b2595dc3c15 SHA-1: 748ae65e828be7e7396f65af749fac3d2f2fec73 SHA-256: b9af30bee0df7c5905dabf6079fd068d7d5c29d34399dba8b475136a137a35ac
70 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. The document body suggests it is an 'Afcat question paper pdf 2018', likely a lure to encourage users to click on the embedded links. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a malicious workflow aimed at redirecting users to potentially harmful content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://4gy.undesirable.us/uploads/1/3/2/3/132303043/132303043.html#afcat+question+paper+pdf+2018
    • http://estradarojas.com/uploads/1/3/1/6/131607053/gijixivesonana.pdf
    • http://honeyskinnblast.com/uploads/1/3/1/3/131383854/1210029.pdf
    • http://gardenthymeacres.com/uploads/1/3/0/2/130270831/7299643.pdf
    • http://rootsandroyalty.com/uploads/1/3/0/6/130604770/219c4.pdf
    • http://mosimannlab.com/uploads/1/3/0/6/130620375/2965993.pdf
    • http://4gy.undesirable.us/uploads/1/3/2/3/132303043/terms.html
    • http://4gy.undesirable.us/uploads/1/3/2/3/132303043/dmca.html
    • http://4gy.undesirable.us/uploads/1/3/2/3/132303043/policy.html
    • https://jemuwad.files.wordpress.com/2020/05/kikitenuxedezuzapoja.pdf
    • https://roxewibedupe.files.wordpress.com/2020/06/8693585614.pdf
    • https://gunobuw.files.wordpress.com/2020/05/vovutosuraliri.pdf
    • https://doxezejid.files.wordpress.com/2020/05/30174245713.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_off00008919.bin
83d203f08be680e469c4244aeaf4a1de47e18401cb49f33799d7cedd3ca028a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8919 11304 bytes

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