Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c01bcf7020b1a4c…

MALICIOUS

PDF

89.6 KB Created: 2021-07-04 10:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6487165bb4c3b78837cb1970a65a2c07 SHA-1: 0121c518502a6cfcec4e526fee9123ba49ce4077 SHA-256: 5c01bcf7020b1a4cdbe9cdea511db10153e0c3e245a70458ce9ea398e96f2b2b
96 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to compromised WordPress sites, many of which host other PDF files. This structure is indicative of a link farm designed to distribute malicious content or phish users. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 5

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be618c482c0---52269781280.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf9ed9673f---zulixisakogev.pdf
    • http://trungtinjsc.vn/upload/FCK/file/desoni.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160deeb0ead187---57897908247.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/uruis9qpp92bvh4jtvf0smj57p/xekusobi.pdf
    • http://daindnc.com/fckeditor/userfiles/file/zaxinamo.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/856f4b28ce69d9d1cce0799036db4601/rabutadexitevodax.pdf
    • http://elite-nails.pl/Upload/file/pikisokezevilemorapumajok.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/b683o23de426k4b4jc4b193e0j/98921965485.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096715cf187c---11820737585.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f4bf9d3f1---fumilumilezim.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b753d641378---85495955125.pdf
    • http://steelbo.com/uploads/admins/u0/files/20210530025728.pdf
    • http://xzass.org/ckfinder/userfiles/files/garinixekukadebarovamuw.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/632imd05cj1lcht2rogkscktc6/75444459693.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ab7e957a0---10317504586.pdf
    • http://ankamet.com/userfiles/file/wilutulunugebaxexowobevi.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/9vuvm6d5kafkga9sntqt016hq6/vozet.pdf
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/zopasironifaterikewu.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf8688bb1---tikoro.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105070259204972.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160879c2b24466---3383621851.pdf
    • https://bd-sokolovska.eu/userfiles/file/womojukofan.pdf
    • http://studiogallerani.it/userfiles/files/24989228427.pdf
    • https://art-lamps-rali.eu/files/file/gewifumavazipemirugadopa.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16096309349705---davusajeferibefon.pdf
    • http://pileshoppen.dk/userfiles/file/zejepix.pdf
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gokepukomejexopotub.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=the+secret+red+book+of+leadership+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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f989.bin
67c87ffb90bc0a3c6466df0194143404c22899fb1f74cc8f5ac20d802eb187d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 17700 bytes
font_01_sfnt_off000127f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127F6 16792 bytes
font_02_sfnt_off0001400d.bin
61a4433dfb53f19cc003453529446c482221b591d99680bb20f2db8c3c28da71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1400D 10808 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.