Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac20448ddbdbfec…

MALICIOUS

PDF

46.4 KB Created: 2020-04-13 23:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cca6c0822b9136783586e6b515abac7d SHA-1: f1017977f0cfc5932e1e61a3139e5a37e9ebf879 SHA-256: cac20448ddbdbfec59c2784008c613f68e29addeebca307eb4ad1c73aa1dc87d
94 Risk Score

Malware Insights

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

The PDF file was identified as malicious by an ML classifier with high confidence. It contains numerous external links, many of which are structured as SEO-optimized PDF lures, suggesting a link farm or traffic-driving scheme. The document body, though heavily obfuscated, contains text related to 'USFDA guidelines for clinical trials', which is likely a lure to encourage clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://xrossingborders.net/uploads/1/3/0/3/130379466/130379466.html#usfda+guidelines+for+clinical+trials
    • http://thefamilyfarm.ca/uploads/1/3/0/3/130323253/6565675.pdf
    • http://raylaillaw.com/uploads/1/3/1/4/131409074/5460791.pdf
    • http://acat.limo/uploads/1/3/0/4/130483345/47af424d.pdf
    • http://bright-haven.com/uploads/1/3/1/4/131453453/1030099.pdf
    • http://lifetimeiptv.com/uploads/1/3/0/7/130775484/jegojamor-bosabirob-pobitovulex-getobidex.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_off000084e8.bin
2d9b8c387c991ecb6aa226c628b8a6ada40cc8169bb3c588e82ebe163fd56d7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E8 1960 bytes
font_01_sfnt_off00008dce.bin
1737819efafd820c9c95441453a07b1ca0bc925413f2e2069503130042d55a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCE 8196 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.