Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46c8a46086bd4c7…

MALICIOUS

PDF

47.3 KB Created: 2020-04-21 12:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 28f4bb2c5968be3cf3df9cbf81d2164b SHA-1: f64ad926195f4d12e03af10931582e72e6c0a51f SHA-256: d46c8a46086bd4c7729d88b9044b1000e65b647b0eaf0c1c24737aa5b42b8d41
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 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 manipulation tactic, often used to distribute malicious content or improve search engine rankings for malicious sites. The presence of a 'Download Button' heuristic further suggests an attempt to trick the user into interacting with the document. No scripts were extracted from this sample, limiting the ability to determine a more specific payload or execution method.

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://rockandrowel.com/uploads/1/3/0/7/130739452/130739452.html#angularjs+bootstrap+themes+free
    • http://shimipetsitters.com/uploads/1/3/0/8/130813849/vezuzufilusunadi.pdf
    • http://alinekostrewa.com/uploads/1/3/1/4/131454397/be1b215c.pdf
    • http://easiersaidconsulting.com/uploads/1/3/0/2/130274345/poraf_mufotimeb_fiwaz.pdf
    • http://dirtpathcreations.com/uploads/1/3/0/5/130551839/wuvipizafozito-dujawoz.pdf
    • http://goldencruisers.com/uploads/1/3/1/0/131069838/numigaje-kijozufudef.pdf
    • http://24h-playgames.com/uploads/1/3/1/0/131071043/purubiwajibi.pdf
    • http://villafrancaabogados.com/uploads/1/3/0/4/130479389/9337162.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007290.bin
4d5786387f6ec52a819f90aef2aa0dcab297104088817fe74bfda328c07da3f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7290 8340 bytes
font_01_sfnt_off00009283.bin
8ec8c2252d1b0a1cc16637c0e1f77da7137146423e231c53be47bbaf832064ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9283 2048 bytes
font_02_sfnt_off00009c27.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C27 16036 bytes

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