Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7fa3309e7c7ce97…

MALICIOUS

PDF

71.8 KB Created: 2020-04-04 12:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 58a50194bb907c143fd2fa65fb440614 SHA-1: b7498f99d60973e6f9a2c486a210c85f73a92268 SHA-256: d7fa3309e7c7ce97aec9084e32d741a85e9eaa08e942250d2aa69f2c23819043
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded JavaScript and a large number of external links, indicating a malicious intent to redirect users. The PDF_SEO_LINK_FARM heuristic specifically highlights the mass of external links, with the dominant host being jessicasgrooming.com. The embedded JavaScript likely facilitates the redirection or further malicious activity. The document body text is heavily corrupted, making it difficult to ascertain the exact lure.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://rethinksw.com/uploads/1/3/0/9/130969632/130969632.html#naturaleza+de+la+comunicaci%C3%B3n+humana+del+libro+mcentee
    • http://jessicasgrooming.com/uploads/1/3/0/8/130814172/1f74668ad6f7f7c.pdf
    • http://itradearabia.com/uploads/1/3/0/6/130604498/kubazujasenisefetap.pdf
    • http://ivylasheshawaii.com/uploads/1/3/0/5/130588951/pujewepib.pdf
    • http://flauntfashion.net/uploads/1/3/0/7/130739131/b803a7bc99fa.pdf
    • http://motercontrol.com/uploads/1/3/0/7/130775959/nedaku_fazajabaja_galisuwurad_zosogenuvibe.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_off0000ccfc.bin
bb46f44250fe64fa227dfa22b797df6881be5316da04ce10ac221f390735fba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFC 1744 bytes
font_01_sfnt_off0000d53a.bin
a30b5bf96ddf80f906987701f97ecb881e6a7d9832ec85078fa7572108adf383		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD53A 10352 bytes
font_02_sfnt_off0000f9d7.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D7 16036 bytes

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