Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d22d528d9d5d885…

MALICIOUS

PDF

68.0 KB Created: 2020-06-03 03:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fb6402701bf070d50e2b0e0a21518fc SHA-1: 3c9bcd4c4e310fdd3f6114dc09563e4e78a559ad SHA-256: 7d22d528d9d5d885c99fc99aa45da1288e23f15ea0c5ea17ae1f247c4d91ace9
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, many of which point to domains that appear to be part of a link farm designed to host SEO-related content. The document body, though heavily obfuscated, contains references to 'Mount and Blade adult mod' and the wkhtmltopdf tool, suggesting a lure to attract users to malicious websites. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://zhanshenguojizaixianchongzhi.br3h.com/uploads/1/3/1/6/131637503/131637503.html#mount+and+blade+adult+mod
    • http://westshoremedics.org/uploads/1/3/0/8/130814238/8930373.pdf
    • http://mckenzierivervacationrental.com/uploads/1/3/0/5/130588957/vafusagetanujuk.pdf
    • http://chick-pea.com/uploads/1/3/0/6/130639797/9674866.pdf
    • http://investmentbankingvm.com/uploads/1/3/1/4/131437261/rebolo.pdf
    • http://taylorleefit.net/uploads/1/3/1/4/131453041/3452160.pdf
    • http://cookmetaradiddles.com/uploads/1/3/0/6/130639437/6085d.pdf
    • http://heemersolutions.com/uploads/1/3/1/1/131164251/xajuv_jemedakonu.pdf
    • http://zhanshenguojizaixianchongzhi.br3h.com/uploads/1/3/1/6/131637503/terms.html
    • http://zhanshenguojizaixianchongzhi.br3h.com/uploads/1/3/1/6/131637503/dmca.html
    • http://zhanshenguojizaixianchongzhi.br3h.com/uploads/1/3/1/6/131637503/policy.html
    • http://westshoremedics.org/uploads/1/3/0/8/130814238/89303
    • https://zuditavo.files.wordpress.com/2020/06/daposozinu.pdf
    • https://lewarakorin.files.wordpress.com/2020/06/78809872761.pdf
    • https://zeraperusute.files.wordpress.com/2020/05/92536832265.pdf
    • https://mikupekuforu902814454.files.wordpress.com/2020/06/vopiw.pdf
    • https://vuvelerapele.files.wordpress.com/2020/06/wisidimigepiruboxu.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_off0000dd32.bin
23a6763ce53369fe9b8a3d4cb294740dccf38ba11903f18b1751bc07c666aa4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD32 11712 bytes

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