Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd11eac0c9d66c09…

MALICIOUS

PDF

50.9 KB Created: 2020-04-18 00:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b05caab2188e1648707f23033747d32f SHA-1: 8ace906fe091a16f463b12e85d507ca7c5a63b1c SHA-256: dd11eac0c9d66c09049a935c306f394379f49898c39c20afbec0dd20f8a88e2c
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to seemingly unrelated domains and use numeric slugs, indicating a link farm or SEO abuse tactic. One of the embedded URLs, http://michaudwellness.com/uploads/1/3/0/4/130476944/130476944.html#albeniz+asturias+sheet+music+piano, is directly associated with the document's apparent content, suggesting a lure. The 'SE_LOLBIN_RUN_COMMAND' heuristic indicates that the document may contain instructions for executing scripts or commands, potentially leveraging tools like PowerShell, which is a common technique for downloading and executing 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://michaudwellness.com/uploads/1/3/0/4/130476944/130476944.html#albeniz+asturias+sheet+music+piano
    • http://freshairnutrition.com/uploads/1/3/1/4/131406286/tofekipojudutonub.pdf
    • http://camerasandchocolatesphotography.com/uploads/1/3/0/6/130621871/vudawetixeminiweguvu.pdf
    • http://gpsarchibull2016.com/uploads/1/3/0/6/130640139/4001406.pdf
    • http://pebbleandnest.com/uploads/1/3/1/0/131070442/bugaganupa_tazesufedor_sozivaso.pdf
    • http://www.latinosandtech.berkeley.edu/uploads/1/3/0/6/130604162/4318962.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_off00008620.bin
862e43b3cf42f0162d3b8fe5adbef3bb4b5e4624a03ecc326def169480cf471f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8620 9872 bytes
font_01_sfnt_off0000aad9.bin
fb87fb5d50912ad663cdc4573af58719657a1cb9047ea5ba25d7001eae63208c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD9 16192 bytes

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