Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ff12a89ac62dbf…

MALICIOUS

PDF

44.2 KB Created: 2020-04-04 06:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3b741a2a9f00c0a9181a401f33de18d3 SHA-1: 75501f2aa63d2508626f06003683c93698557fba SHA-256: 31ff12a89ac62dbf7d64d505c6e2d3d3951ec192a94264fcb7eadf64fec2995f
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded external URLs, identified by the PDF_SEO_LINK_FARM heuristic. These URLs point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The document body itself contains text related to sentence structures, which appears to be filler content to mask the malicious intent. No scripts were extracted from this sample.

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://skinspiritlife.com/uploads/1/3/0/9/130969403/130969403.html#ejemplos+de+oraciones+simples+compuestas+yuxtapuestas+coordinadas+y+subordinadas
    • http://storgebhs.com/uploads/1/3/0/6/130640107/6e3160702d.pdf
    • http://worldlive22.com/uploads/1/3/0/6/130604948/pasejuxip_lomelijat_tepiwimekab_fokikaxelaz.pdf
    • http://generations-online.com/uploads/1/3/0/4/130478868/9963712.pdf
    • http://xfortis.com/uploads/1/3/0/3/130313113/2053649.pdf
    • http://mail.wremac.com/uploads/1/3/1/3/131380688/fodigajo_noxosevim_zagefon.pdf
    • http://physiquelyunique.com/uploads/1/3/0/2/130291499/ff5ecdf22e9.pdf
    • http://lasocietenouvelle.fr/uploads/1/3/0/7/130776083/9605952.pdf
    • http://walkinmyheels.com/uploads/1/3/1/4/131437823/7062855.pdf
    • http://iconbookkeepingaccounting.com/uploads/1/3/0/3/130323952/rivasim_furudonud_sajep.pdf
    • http://healingspaceplace.com/uploads/1/3/0/6/130604187/mapibud.pdf
    • http://zleeparoos.com/uploads/1/3/1/3/131380592/tevutazageze.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008344.bin
50c7a8c6e9798441d14e577238a8ae0679f6067287c0cfbf05d06e2f5f0ce2cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8344 8756 bytes

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