Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b3d8e8fd40ae92…

MALICIOUS

PDF

52.7 KB Created: 2020-04-12 19:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 68e674f18972e382b8e7751579df9ecf SHA-1: 95c448c1db22b1563a49e4a32b24c5725c1216d8 SHA-256: c3b3d8e8fd40ae926cebc5f5f45961427e085c2c1189e5572c18f01203e3f167
122 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, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or redirection mechanism. The ClamAV detection as Pdf.Dropper.Agent-8499572-0 further supports its malicious nature. The primary attack pattern involves luring users to click on these links, which likely lead to further malicious content or exploits.

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.
  • ClamAV: Pdf.Dropper.Agent-8499572-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8499572-0
  • 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://grimsbyfishmanufacturing.com/uploads/1/3/0/7/130775361/130775361.html#nomenclatura+de+oxidos+e+hidroxidos+pdf
    • http://2030greenla.com/uploads/1/3/0/6/130639440/9caba738.pdf
    • http://orconsultants.org/uploads/1/3/0/8/130874426/29d0f665.pdf
    • http://hearthealthpsa.com/uploads/1/3/0/6/130620453/a33f695500ba338.pdf
    • http://davidtierneypainting.com/uploads/1/3/0/2/130272945/8d1d61623b3cd0.pdf
    • http://mgsesl.com/uploads/1/3/0/7/130740110/vufototuvuj.pdf
    • http://larkinjackson.com/uploads/1/3/0/6/130604702/96b387b.pdf
    • http://mollyvstreiff.com/uploads/1/3/1/4/131453056/tomafur.pdf
    • http://noridirg.com/uploads/1/3/0/7/130738546/680b391f8d.pdf
    • http://aprel8.world/uploads/1/3/1/4/131437656/nafovaxo.pdf
    • http://mthopeucc.org/uploads/1/3/0/7/130775646/mowaviwezevoma.pdf
    • http://intimaresorttulum.com/uploads/1/3/1/1/131164218/botarozevip-fudemolino-zidazapofan.pdf
    • http://mmasgeneralhouse.info/uploads/1/3/0/2/130287989/998312.pdf
    • http://parseccommunications.com/uploads/1/3/1/4/131408772/dekajakozidiku.pdf
    • http://itishowyouthinkk.shop/uploads/1/3/1/4/131453251/fufixivafa.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_off0000977c.bin
10c9b87e0c133b65bda547a8bd88559ef77eae9e23133fc990dc70de6ea5dbc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x977C 10092 bytes
font_01_sfnt_off0000bb19.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB19 2652 bytes

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