Malicious PDF — malware analysis report

Static analysis result for SHA-256 929f576d27013e75…

MALICIOUS

PDF

72.3 KB Created: 2020-04-11 08:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 99dbca061e18700812dcf047963b57ec SHA-1: 8897fff610f7f78c963ba882e6d399434fc24056 SHA-256: 929f576d27013e759d81aa3140413b785d614fd507caf6d599f7739be4c3a8a7
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are part of this link farm. The primary attack pattern involves directing users to a network of external PDF files hosted on various domains, likely for malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://www.xmo1.com/uploads/1/3/0/5/130590363/130590363.html#savage+worlds+character+sheet
    • http://hospitalitytechsummit.ie/uploads/1/3/1/4/131407395/kefunox-zeriselobusufa-gexuve.pdf
    • http://imagination-by-design.com/uploads/1/3/0/3/130323185/949963.pdf
    • http://ellipsisbehavior.com/uploads/1/3/0/6/130639609/8690179.pdf
    • http://comicsgal.com/uploads/1/3/0/8/130814115/wepezo.pdf
    • http://www.premiermdstaff.com/uploads/1/3/1/3/131384559/fimosota_nisefurikuwigob_palaka.pdf
    • http://vithings.com/uploads/1/3/0/7/130738945/266506.pdf
    • http://moderndaymira.com/uploads/1/3/1/6/131637247/jumivakitivoke_reboxe_gojitu_vizixeveliga.pdf
    • http://iistjamaica.com/uploads/1/3/1/4/131454270/9dfbb60.pdf
    • http://lakeworthwaterkeeper.org/uploads/1/3/0/7/130739419/7348356.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_off0000f78a.bin
05c23a4274a86613f1c3ba909c87ef1d7e0086fa713b851c71a78590221d5ec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF78A 7544 bytes

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