Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5966c7331d539c…

MALICIOUS

PDF

39.7 KB Created: 2020-06-20 23:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6c4b528d8924895dcc23f2b6a325964 SHA-1: fc33fb72400148bb1684e006f2f419489ad0442a SHA-256: bc5966c7331d539c0fb3aa2128629ef7af1371ba4454eef024c6b6c96ea0065f
92 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm or SEO spam, designed to direct users to a network of potentially malicious websites. The ML classifier strongly indicated maliciousness, and multiple external URIs were found, many with numeric slugs, suggesting a coordinated effort to distribute content across various domains. The document body contains text related to 'exercise and health psychology' which appears to be a lure to encourage clicks on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ga65q.slpny.com/uploads/1/3/1/4/131483249/131483249.html#exercise+and+health+psychology
    • http://andersonrubio.com/uploads/1/3/0/3/130323390/2034245.pdf
    • http://podiumsv.com/uploads/1/3/0/6/130604785/baderi-kugewilar-xopinuroluvo.pdf
    • http://time.rgengineers.com/uploads/1/3/1/4/131454355/puwerizimo.pdf
    • http://aromahippychick.com/uploads/1/3/0/2/130271250/4a5352a33.pdf
    • http://mraducanu.com/uploads/1/3/0/2/130288412/8910794.pdf
    • http://childrensmuseumofnewnan.com/uploads/1/3/0/5/130589140/712d465375.pdf
    • http://shop.shalomhealthsolutions.com/uploads/1/3/0/5/130541574/ccf393efd37fb0.pdf
    • http://quickgreennow.com/uploads/1/3/0/4/130476873/ketasapuxujovam.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_off00005d7e.bin
7fcce575c1c45450c0923e57d430c291f68b69c1a212b6306de993b511cd59dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7E 5248 bytes
font_01_sfnt_off00006f59.bin
5b455381af61cbead0e6b0716e7490b250a97f750e3f38081684483e3972d20e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F59 10452 bytes

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