Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95a8ef245b7031b…

MALICIOUS

PDF

31.7 KB Created: 2020-04-05 12:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8301955e77bffa161b2b6efab86d8dbd SHA-1: 72e8cc12ac18d67b0a78e6e03ff7cd7d57fc5d4f SHA-256: b95a8ef245b7031b6ce312f880005ce2b2675c2bedc66e17ddec35c2690b0d0a
62 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this malicious intent. 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://gmchamberpatrons.com/uploads/1/3/0/9/130970005/130970005.html#formulas+de+fisica+para+movimiento+rectilineo+uniformemente+variado
    • http://totalaccesssolutionsltd.com/uploads/1/3/0/5/130588565/2507771.pdf
    • http://loseweightwithsurgery.com/uploads/1/3/0/3/130379379/0034ac9257.pdf
    • http://salmonguitarschool.com/uploads/1/3/1/4/131453558/lebizijamagitenesaxi.pdf
    • http://skrabalica.net/uploads/1/3/1/3/131380942/5701609.pdf
    • http://larrylovescannabis.com/uploads/1/3/0/3/130323355/3792868.pdf
    • http://jayedancer.online/uploads/1/3/0/3/130379356/fivivafojik.pdf
    • http://foreningdanmark.org/uploads/1/3/0/3/130323180/wefare.pdf
    • http://storytailor.biz/uploads/1/3/0/8/130874529/zenaxomuwupidu-totirorajipofi-furefusugata.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_off000052a1.bin
4c0c55e2a5a8062459e0937df9e370d48f324441b8b7c433e2fe6cfe640f25b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52A1 7684 bytes

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