Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f253f0599edccb…

MALICIOUS

PDF

30.8 KB Created: 2020-04-12 19:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5530944199a63657fe255699eb5b9f72 SHA-1: efbc14463c6918fd9558c82ce3e6547f75444449 SHA-256: 82f253f0599edccbb7826a840c583ccda3af4c3f917181aa6b7a5f708827f594
62 Risk Score

Malware Insights

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

The PDF file contains numerous external links to domains that appear to be part of a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains references to a 'rain bird rain sensor manual' and the authoring application 'wkhtmltopdf', suggesting a lure. The primary purpose appears to be directing users to a network of SEO-optimized PDF files hosted on various domains, likely for traffic generation or to host further malicious content.

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://grillou.fr/uploads/1/3/1/4/131484603/131484603.html#rain+bird+rain+sensor+manual
    • http://makeupandsparkle.com/uploads/1/3/1/6/131606746/makog_bedenukorumora_fanerilawenegel_tubefikufexurag.pdf
    • http://ebssolarelectricandair.com/uploads/1/3/0/5/130551456/satafiziwelus.pdf
    • http://genx-er.com/uploads/1/3/0/5/130550920/pexomogofiro.pdf
    • http://johndreedy.com/uploads/1/3/0/5/130588931/votuson_nazevowum_kiwodefagim.pdf
    • http://anthonyimgrund.com/uploads/1/3/0/7/130739021/12b5f74fa8.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_off00004e86.bin
07baac89d577ead28f94e2351b59d3b3d54d05a984c6bbbc59dd98f63f2d477a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E86 8308 bytes

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