Malicious PDF — malware analysis report

Static analysis result for SHA-256 3953339d84fd800d…

MALICIOUS

PDF

35.8 KB Created: 2020-04-17 03:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 645dfbb455c5225eeae2986a129cae22 SHA-1: 9db4f8d3f897fc214e5ce2850e03e41ddbc24737 SHA-256: 3953339d84fd800df19e1d22611e8962a5a741c616d6141c240e2c88e1c561d8
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO spam tactic. The document body, though heavily obfuscated, contains references to 'geographic information system pdf ebook' and the wkhtmltopdf application, indicating a lure to external content. The presence of numerous unknown URLs points to a potential distribution or redirection mechanism.

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://holbaeksymfoni.com/uploads/1/3/1/0/131070393/131070393.html#geographic+information+system+pdf+ebook
    • http://stofafrica.org/uploads/1/3/0/6/130605312/xakinovi_tudiluvowe.pdf
    • http://alswirkinderwaren.com/uploads/1/3/0/2/130289226/gazililig.pdf
    • http://magilladesign.com/uploads/1/3/0/4/130435892/51fe47971e4d47.pdf
    • http://scoopsphotography.com/uploads/1/3/1/3/131383429/230350cfba85f9.pdf
    • http://tgannuscia.com/uploads/1/3/0/2/130271046/lozokidotumub_vaxalulam_raludow_wakupunosuxoxuw.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_off0000661e.bin
bb1a050b7e61d63d8798958cc101fcdddaaf9b1494bd2349755735da7d7b67d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x661E 7580 bytes

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