Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4bd114e49efd125…

MALICIOUS

PDF

43.3 KB Created: 2020-04-07 06:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 56e53dcb8984d9e9c7c29203dc509104 SHA-1: 0f295d62ee8cbc6183834349028c5ea3cf871ee5 SHA-256: e4bd114e49efd12593bec77f96eca055102a7d31ac3b6951f87b9cae8442319d
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 partially corrupted, suggests a lure related to 'Examen resuelto matematicas 3 prepa abierta'. The primary intent appears to be directing users to a network of linked websites, likely for SEO spam or to host further malicious content. No scripts were extracted from this sample.

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://befreetherapy.com/uploads/1/3/1/4/131437283/131437283.html#examen+resuelto+matematicas+3+prepa+abierta
    • http://suministrosvilladell.com/uploads/1/3/0/2/130289592/bd2b58ccbc4.pdf
    • http://cuestionentrerriana.com/uploads/1/3/1/3/131383893/4287860.pdf
    • http://ianthemarini.com/uploads/1/3/0/9/130969600/930e6309d2c3cf.pdf
    • http://journeytomichelin.com/uploads/1/3/0/5/130542692/zifepijanirifas.pdf
    • http://smootherwaters.com/uploads/1/3/0/6/130639321/nutugosol-sexoniger-mexev.pdf
    • http://videocritic.com/uploads/1/3/0/3/130313390/zuzelavavodukedizade.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_off0000633d.bin
3bff2c0b6090598b02c6473634a73efa2ea77a1ad3cb1c22d3233b00049a998d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633D 10100 bytes
font_01_sfnt_off000087bb.bin
009bab1ec6d3a8b690e5052e945714508b6ada0cb83ae92d88374b126a6aada1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87BB 16544 bytes

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