Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13582ae624e0ecd…

MALICIOUS

PDF

46.3 KB Created: 2020-06-18 21:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e54b1932e4eab464ccaef60f44a5ae0 SHA-1: e35bccd5ac75ef5e5144fb0210144ddb5a89948d SHA-256: a13582ae624e0ecd1a7c3197757e560673f0c672bcbf87c93b4f63180f334813
62 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, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, contains text related to 'Quality center pdf tutorial' and 'wkhtmltopdf', indicating a lure to a website. The primary heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a malicious PDF designed to redirect users to potentially harmful content via a network of generated links.

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://sleepysteps.com/uploads/1/3/0/8/130815482/130815482.html#quality+center+pdf+tutorial
    • http://wildmushroom.org/uploads/1/3/0/7/130776529/lusowexinir.pdf
    • http://cameronstish.com/uploads/1/3/0/6/130639557/nogup.pdf
    • http://nilesrs.com/uploads/1/3/1/4/131411199/1368640.pdf
    • http://rachelcooksketo.com/uploads/1/3/0/6/130639764/d5cd86d2.pdf
    • http://currypoint.net/uploads/1/3/0/6/130604249/fixigibukumunarab.pdf
    • http://viequesrentalwithviews.com/uploads/1/3/0/7/130738507/e38143e.pdf
    • http://charlottetow.net/uploads/1/3/1/1/131163643/xerupakibudinax.pdf
    • http://mta-sts.mx.tatatomic.com/uploads/1/3/0/3/130379864/xuberuberetisud.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_off00007751.bin
725678a6cc8b307203b58500ede27f0d5b3f04e687873604db70b5c52c2af5e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7751 5016 bytes
font_01_sfnt_off0000886e.bin
3379e13da01e2c7d3f61040f00d6aabce9d3fda0bef96bca7cc8d270430f82cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x886E 10732 bytes

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