Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf4b766e61acf1e…

MALICIOUS

PDF

40.2 KB Created: 2020-04-21 02:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b5ca0a8e243579351914159d09635498 SHA-1: fe5a70a79432a1ca62ea7f015c7d3bdbdb241685 SHA-256: ebf4b766e61acf1e0989f5c29ea18307328195cc933da927426c0c710b75320a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document contains a large number of external links, many of which are dynamically generated and point to PDF files, indicating a link farm or SEO abuse tactic. The document body, though partially corrupted, contains text related to 'sheet music' and the wkhtmltopdf application, suggesting a lure. The presence of a 'Visible LOLBin command execution instruction' heuristic firing suggests that the document may also attempt to execute commands, potentially to download and run further payloads.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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://thesoonernetwork.com/uploads/1/3/1/6/131636969/131636969.html#kiss+of+fire+hugh+laurie+sheet+music
    • http://actioneleven.com/uploads/1/3/0/4/130483478/pomekamaw_kawebovutasolir_wugatemifuran_vevagomexi.pdf
    • http://sewdivinecreations.com/uploads/1/3/1/4/131454383/08be88b.pdf
    • http://goody2.net/uploads/1/3/0/6/130640052/5431a9aaa.pdf
    • http://unclebiffscaliforniakillercookies.com/uploads/1/3/0/6/130605432/wonovipikavifo.pdf
    • http://antonioduarte.org/uploads/1/3/0/5/130551218/doneja-mudupunutiviw.pdf
    • http://xteraweb.com/uploads/1/3/0/4/130483537/bb03ee17dd8e83.pdf
    • http://driso-music.com/uploads/1/3/0/2/130272940/lapiperivufe-gurepifisus-fimarix-kukojupuxanes.pdf
    • http://thedubdesigners.com/uploads/1/3/0/4/130488312/pikowadijapage.pdf
    • http://yogaandwellnesswithbetsyjodi.com/uploads/1/3/1/3/131381150/a23ab3878b3a58d.pdf
    • http://windowscleanersyork.com/uploads/1/3/0/5/130589312/7533433.pdf
    • http://acehighcheerandgym.net/uploads/1/3/0/3/130323139/9030553.pdf
    • http://betterthanbadgamers.com/uploads/1/3/1/3/131379035/gudivobaxebuzel_pusadaru_nenolevebudovis.pdf
    • http://americanfamilygeriatriccare.com/uploads/1/3/0/9/130969301/mumawafewozupew_fadigivetu_romupubuze.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_off00007388.bin
78a34b1e1dfe6f0425cfb95ab0589ba3a331e4bf4a1d98125b4544109df51b1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7388 9216 bytes

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