Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24fb0b253910e9e…

MALICIOUS

PDF

36.7 KB Created: 2020-04-17 01:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8ff2026ce56506f11141ed9d4cb0ef99 SHA-1: d84aaa1593f05d05453723fe0d8a08492c90a822 SHA-256: c24fb0b253910e9e0017f4c04c0b79395a6fa626112b42c6b54072c49742774a
62 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a distribution mechanism for further malicious content. The document body, though partially corrupted, contains a title related to 'Multiplying and dividing rational expressions worksheet', which is likely a lure to disguise the malicious intent of the embedded links.

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://uibffworld.org/uploads/1/3/0/7/130775654/130775654.html#multiplying+and+dividing+rational+expressions+worksheet
    • http://stentoriantones.com/uploads/1/3/0/5/130551095/3167299.pdf
    • http://drugsanalytics.com/uploads/1/3/0/4/130483810/pakizilor.pdf
    • http://nkronline.com/uploads/1/3/0/4/130435881/gamejo-digidep.pdf
    • http://vebastore.com/uploads/1/3/0/7/130738527/jilisorutopaj.pdf
    • http://belladesgagnes.com/uploads/1/3/0/8/130873927/f0c151613df2d7.pdf
    • http://allvalleyacoustics.com/uploads/1/3/1/6/131607013/10dce2581.pdf
    • http://spassocafe.id/uploads/1/3/0/8/130813731/jijaluduluneta.pdf
    • http://nashvilledrones.com/uploads/1/3/1/3/131381243/4441537.pdf
    • http://tracyhansenvibranthealth.com/uploads/1/3/1/3/131383480/zunalaf.pdf
    • http://purehumboldt.xyz/uploads/1/3/1/0/131070538/a329ca3f618e7.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_off00005085.bin
cd355383d63b9096dfbbba87d379d7fb89b35627071f2e65151d8759cca1cb4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5085 8428 bytes
font_01_sfnt_off00007109.bin
3e9a9dfb40a01f9f7c9c545b28ba37f1de74591f2b47bc69a9983f40f3f3ebd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 16080 bytes

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