Malicious PDF — malware analysis report

Static analysis result for SHA-256 c16df069a7e77dfd…

MALICIOUS

PDF

38.3 KB Created: 2020-04-05 04:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5f4edf6f7c2fc05185f801c585055adf SHA-1: 62a3eadf91ceb3107f1fac693aae575cc940e323 SHA-256: c16df069a7e77dfdec597e95126ae6ef0f26062c57b5bb494929c96864c63450
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, indicating a link farm or SEO spamming attempt. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, pointing to multiple domains that host PDF files. The document body contains fragmented text and metadata, but the primary malicious activity appears to be the distribution of these numerous external links.

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://tarasnaumenko.com/uploads/1/3/0/8/130873954/130873954.html#trump+think+big
    • http://www.callahancarestutoring.com/uploads/1/3/1/0/131071033/dijajoloberon.pdf
    • http://mydontuknowwhoiam.com/uploads/1/3/1/3/131383469/dapifatar-tezobotezo-durik-welow.pdf
    • http://nzeventsnz.org/uploads/1/3/0/6/130622042/743e6e17952.pdf
    • http://otstottdesign.com/uploads/1/3/0/7/130775506/12c7d4647b6624a.pdf
    • http://emilymuthersbaugh.com/uploads/1/3/1/0/131069789/gumopotop-reguxitu-vomusewusis-wekesebunewek.pdf
    • http://amsolutionswehavethesolutionforyou.com/uploads/1/3/0/5/130546432/41183ccd90dadd1.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_off00006feb.bin
1bfbaea8a9c3b7300ffb1dcdf90b38fa7dc6e0cdf5836c945f1818dc8b52fe62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 7520 bytes

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