Malicious PDF — malware analysis report

Static analysis result for SHA-256 21145da7008f1bdf…

MALICIOUS

PDF

38.7 KB Created: 2020-06-24 21:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aae12acf8f9a79c861c4618d1dad2b2 SHA-1: 54e59bc4403dcf853747840400b7a54c86de95f1 SHA-256: 21145da7008f1bdff1bfa146c0c05e7ce29e0660a72624cf67b4411f06487581
70 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The document itself is disguised as a guitar chords chart, likely to entice users to click on the embedded malicious links. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this malicious intent. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://tdpaddamsfamily.org/uploads/1/3/0/2/130271161/130271161.html#guitar+bar+chords+chart+pdf
    • http://orderingrxlensesonline.com/uploads/1/3/0/2/130288326/824059.pdf
    • http://bournemouthmascots.co.uk/uploads/1/3/0/3/130324112/0c31fb40.pdf
    • http://3axisphotography.com/uploads/1/3/0/5/130540926/773435.pdf
    • http://thequickfox.net/uploads/1/3/0/7/130739742/8772989.pdf
    • http://kelleyandgeorge.com/uploads/1/3/0/7/130775198/givivu-mezubavagi.pdf
    • http://brainbrandllc.com/uploads/1/3/0/7/130739817/4557845.pdf
    • http://darisayrealestate.com/uploads/1/3/0/2/130289333/gabirapamejumo_tewezusufebovag_danejapi.pdf
    • http://dominionmusicgroup.com/uploads/1/3/0/5/130590224/xawavefoserutul.pdf
    • http://2zm.undesirable.us/uploads/1/3/0/5/130550910/6938965.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_off00005aa6.bin
3ea0ab9f37dbf7c6ae97529f0534fb92fefad438f57072cbac69378eedf68945		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA6 5040 bytes
font_01_sfnt_off00006bd2.bin
7fb313620383cc927538a4f25651bb4e520615c0bd1a370aae9e3925a96561db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD2 10316 bytes

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