Malicious PDF — malware analysis report

Static analysis result for SHA-256 994423cfaaf6aa57…

MALICIOUS

PDF

43.8 KB Created: 2020-04-15 14:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: af72f3467f2bf875a4f96e4daa471775 SHA-1: 559b276eec2bcecd76b3c578be7cb9a33438d2f8 SHA-256: 994423cfaaf6aa5712e3e3ec571d87d52c4d5dfb0690f08bf265e2b01e9115d2
152 Risk Score

Malware Insights

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

This PDF file was detected as malware by ClamAV and a machine learning classifier. It contains a large number of external links, many of which point to other PDF files on similar domains, suggesting a link farm or redirection mechanism. One of the embedded URLs, 'http://mrstruitt.com/uploads/1/3/1/1/131163620/131163620.html#type+2+diabetes+eating+guidelines', is presented as a document body related to diabetes eating guidelines, likely a lure to disguise malicious intent. The primary function appears to be acting as a dropper for further malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • ClamAV: Pdf.Dropper.Agent-9552451-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9552451-0
  • 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://mrstruitt.com/uploads/1/3/1/1/131163620/131163620.html#type+2+diabetes+eating+guidelines
    • http://saltyshoal.com/uploads/1/3/1/3/131379015/1714356.pdf
    • http://foodembargo.com/uploads/1/3/1/4/131407537/e0395c50da.pdf
    • http://movingbackdrops.com/uploads/1/3/0/2/130271207/novowugimelume_torikukavotade.pdf
    • http://flexpropartners.com/uploads/1/3/1/4/131407796/a40a9e.pdf
    • http://royalloren.com/uploads/1/3/0/3/130324075/xotujir_wuluputobuvoxa.pdf
    • http://accentusdirectllc.com/uploads/1/3/0/5/130590770/dubadekelow.pdf
    • http://autowawsk.com/uploads/1/3/0/4/130488286/3d774247fd5.pdf
    • http://acceleratedfirm.com/uploads/1/3/0/3/130323930/kijosis_wutonunofel_wutuvomo_benosokeba.pdf
    • http://lizadevaneydivorcemediator.org/uploads/1/3/0/5/130588378/c05bd89a23ea.pdf
    • http://saltyshoal.com/u
    • 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_off0000850e.bin
eb96e32c190d143f653515aba7b21a1c383fd2d87403dabf379f2b44f83ccf28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x850E 7820 bytes

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