Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6c4cb822147217…

MALICIOUS

PDF

36.6 KB Created: 2020-03-29 14:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 86526c5a4f8231b424c86a03df2e396f SHA-1: 8b5dc5f26863a5ff7814db791fb06aa35c95d8b6 SHA-256: 4f6c4cb8221472173c31d7925f9d10f823c84d70974b3d8b1a00014f16b13f2b
62 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, many of which point to PDF files hosted on various domains. This behavior is indicative of a link farm or a phishing campaign designed to direct users to potentially malicious content. The primary URL, http://74-123-77-204.mgwnet.com/uploads/1/3/0/2/130288811/130288811.html#contribution+to+the+concrete+strength+versus+water-cement+ratio+relationship, appears to be the main lure.

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://74-123-77-204.mgwnet.com/uploads/1/3/0/2/130288811/130288811.html#contribution+to+the+concrete+strength+versus+water-cement+ratio+relationship
    • http://citizensfirstfinancialgroup.com/uploads/1/3/0/7/130738504/kukojo.pdf
    • http://shakespublications.com/uploads/1/3/0/6/130640000/4411480.pdf
    • http://catherinebowen.com/uploads/1/3/1/0/131070733/kufilunosevivupobo.pdf
    • http://smoke7stars.com/uploads/1/3/1/4/131437246/134446.pdf
    • http://annemiekbailey.com/uploads/1/3/0/2/130289232/jodefopuwig-masepexitediku.pdf
    • http://howgills.net/uploads/1/3/0/7/130740027/5cb0856468.pdf
    • http://terrasouthlandcare.com/uploads/1/3/1/1/131164077/e21d3faa.pdf
    • http://skyeyesunmanned.com/uploads/1/3/0/4/130488979/5dae870bca.pdf
    • http://costarslive.info/uploads/1/3/0/4/130478484/demuroviw.pdf
    • http://elkhaart.com/uploads/1/3/0/7/130775002/fb61f47.pdf
    • http://homeshalfway.org/uploads/1/3/0/8/130814101/vetotabami.pdf
    • http://byerleystud.com/uploads/1/3/0/4/130435601/dikonowudadej.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_off0000668b.bin
00c6720b6aeec9cae528d6508ee898545d6f43694969c7afc0b89fefc6a90626		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668B 7824 bytes

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