Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d14e57dd7f34b4d…

MALICIOUS

PDF

27.8 KB Created: 2020-05-25 17:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b9f6156f04cdd75211d61fc9a80f0f3 SHA-1: 89036af337c118a38695b38a452e621eb5a3197b SHA-256: 4d14e57dd7f34b4d712f6cc6e476867b086665bec650deac875a9ef305a0fabf
70 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF documents hosted on various domains. The document body, though partially corrupted, contains text related to 'Organizational behavior 13th edition' and the wkhtmltopdf application, suggesting a lure. The presence of a 'Download Button' heuristic further supports the idea that the user is intended to click these links. The primary purpose appears to be directing users to a network of linked PDF files, likely for SEO spam or to distribute further malicious 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://iavnt.com/uploads/1/3/1/6/131606183/131606183.html#organizational+behavior+13th+edition
    • http://kelseyleon.com/uploads/1/3/0/7/130776573/3908683.pdf
    • http://arkansasassociations.com/uploads/1/3/0/2/130270793/kuginixoponiju.pdf
    • http://uxdiscover.com/uploads/1/3/0/6/130639541/sutuliv.pdf
    • http://canalsigling.com/uploads/1/3/1/6/131607712/nutikix.pdf
    • http://nmisria.com/uploads/1/3/0/4/130476587/3625552.pdf
    • http://roseeducation.com/uploads/1/3/0/2/130289638/kemigepemomuti.pdf
    • http://fayerweatherhouse.com/uploads/1/3/0/6/130639534/bdb0743368dd.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_off000044c8.bin
25bfc0a6f108fa539dd88a334d7e5366b70ace381bcf94841a1f37ab79d7ddc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44C8 9256 bytes

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