Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5bd9933fdf3d0b…

MALICIOUS

PDF

50.6 KB Created: 2020-06-05 06:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f1e8f426103d6844d8664aebd21e1ec SHA-1: 15b39d0f380cfb56ac9f16ef92afc3144880f781 SHA-256: 7f5bd9933fdf3d0b12f96b6a87bd3b1d9c611590a330d18fc23f532d47b4b90e
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, indicating a link farm or SEO manipulation tactic. The primary heuristic firing, PDF_SEO_LINK_FARM, confirms this behavior, pointing to reworkworldwide.org as a dominant host. The embedded URLs suggest a potential distribution or redirection mechanism, although no specific payload download or execution script was identified. The document body contains metadata and a URL that aligns with the link farm heuristic.

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://idest.group/uploads/1/3/1/4/131407143/131407143.html#anime+like+battle+girl+high+school
    • http://reworkworldwide.org/uploads/1/3/0/6/130620852/zirikefise.pdf
    • http://mta-sts.gbglobalconsulting.com.mx/uploads/1/3/1/8/131857419/xulexotexomidokoro.pdf
    • http://johnydeluna.net/uploads/1/3/0/5/130551249/8097911.pdf
    • http://74-123-76-89.mgwnet.com/uploads/1/3/0/2/130291786/ec8da4c74f3f5.pdf
    • http://opti-shield.com/uploads/1/3/0/2/130270752/pabisolosaviwigis.pdf
    • http://chixwhovibe.com/uploads/1/3/0/7/130775490/5446650.pdf
    • http://legacycaengineering.com/uploads/1/3/0/6/130640044/6884186.pdf
    • http://drumschoolkevinsmal.com/uploads/1/3/0/2/130291575/metaxedapiduwin_meliwikosirusen.pdf
    • http://idest.group/uploads/1/3/1/4/131407143/terms.html
    • http://idest.group/uploads/1/3/1/4/131407143/dmca.html
    • http://idest.group/uploads/1/3/1/4/131407143/policy.html
    • https://pujudijopek.files.wordpress.com/2020/06/9258649429.pdf
    • https://ruvulosa.files.wordpress.com/2020/06/7064626278.pdf
    • https://rozirul.files.wordpress.com/2020/06/9976148192.pdf
    • https://senexivoxol505468380.files.wordpress.com/2020/06/43379844181.pdf
    • https://bijetukexer.files.wordpress.com/2020/06/83628279990.pdf
    • https://lezidonopo.files.wordpress.com/2020/06/71315159068.pdf
    • https://lazasivi.files.wordpress.com/2020/06/xebixaviminuvesafifokedu.pdf
    • https://zawonaj.files.wordpress.com/2020/06/lapasamofaligavilixukop.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_off0000736a.bin
d9f81f3a53578681cdc7566041b84de026655fc92bf2d11c58748f53bc8796a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736A 4384 bytes
font_01_sfnt_off000082b7.bin
f534ed0687ff0e01f652bd442496b1189c607e54f6e2da5d580250224ea3c3db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B7 10488 bytes
font_02_sfnt_off0000a6a1.bin
29a60492f44b39d68fa00197234d6df9a0cf581d74754725da64c153577ac146		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A1 16132 bytes

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