Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9aee7d309b9bf4…

MALICIOUS

PDF

39.2 KB Created: 2020-04-10 01:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2c3ecda400f557dc0e3e66f8951f1879 SHA-1: a8b8d485ae3ee49a1ec46f24c287402289664380 SHA-256: fb9aee7d309b9bf45d5233d6a437cc15dbbc48bdf5c674aaa10644a0ba679b9f
72 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on different domains. This behavior is indicative of a link farm or SEO poisoning tactic, designed to drive traffic or potentially distribute further malicious content. The presence of a 'download button' heuristic further supports the idea that the document is intended to trick the user into interacting with these links. No scripts were extracted, limiting the analysis of direct payload delivery.

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://alexmcmichael.com/uploads/1/3/0/3/130324278/130324278.html#napa+meridian+id
    • http://the-boat-online.com/uploads/1/3/1/4/131406662/044d44f1.pdf
    • http://staritzen.com/uploads/1/3/0/5/130546742/4925851.pdf
    • http://pantrycafeandcateringcompany.com/uploads/1/3/0/3/130379170/1c7501d6b01f.pdf
    • http://mvestatehomes.com/uploads/1/3/0/5/130590122/zozolosa.pdf
    • http://designedbythetides.com/uploads/1/3/0/3/130379371/puvosojiwimikisavig.pdf
    • http://andonbutton.com/uploads/1/3/0/4/130491594/telebotafepewagawes.pdf
    • http://foundationofthekoegles.org/uploads/1/3/0/9/130969763/xisalurovifitudu.pdf
    • http://morethanapipeline.org/uploads/1/3/0/7/130775728/mewofutuwojanatix.pdf
    • http://zadalashes.com/uploads/1/3/0/6/130604452/df68d8e7d3.pdf
    • http://staysharpbarbercollege.net/uploads/1/3/0/7/130775162/9509727.pdf
    • http://pablosrun.com/uploads/1/3/0/8/130814225/27cb1eb9d36cc0b.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_off00005bd9.bin
cea43574913d96f3fe26cb74d64fb749773663d0e9c08216ad7e5f6ef4e200ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD9 7936 bytes
font_01_sfnt_off00007ab8.bin
298f87a37b282755b17879ef28bd8008b5d5927fa8ce0db4577aba4a05cf2386		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB8 16152 bytes

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