Malicious PDF — malware analysis report

Static analysis result for SHA-256 47af5bda63a50cb6…

MALICIOUS

PDF

83.2 KB Created: 2021-06-28 00:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2685ace11bef04ef07154fcad89b88b4 SHA-1: 111fbe60b02a2a246d50da146d41d8ffa1b693ea SHA-256: 47af5bda63a50cb6312f06312f28cbd4a1231affb5142eb83c7c13d0e0218a68
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded JavaScript likely facilitates redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://casier-a-bouteilles.com/file/raderamirotukumar.pdf
    • http://haiqi-machine.com/d/files/46727026624.pdf
    • http://alexlunacoach.com/img/editor/file/gemowoponapajewoge.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/2d2681f58e2db25148594d86dea3685b/62637230570.pdf
    • http://eksan-ltd.com/userfiles/file/78328158851.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a64e8f49aff---33024419374.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079194d20ce3---rutefam.pdf
    • http://techniq.ae/admin/uploadfiles/file/31080370186.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160944942e6e77---14132955411.pdf
    • https://ahha.az/userfiles/file/16866186974.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079f53c71fbc---62583156135.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/d226e0629856098804c796362d46ae73/26552161375.pdf
    • https://ancoraeducacion.com/images/20304111100.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/hd7mco48pdofa0hsklrakm24lh/93868871151.pdf
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210527232505.pdf
    • http://longbienco.com/js/ckfinder/userfiles/files/68555164733.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d54a64bf88---59272488221.pdf
    • https://mobilieroccasion.fr/uploads/file/77310654415.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c88a315888a---46243152378.pdf
    • http://xsjprinter.com/d/files/68169604375.pdf
    • http://toyteepee.com/uploadfiles/file/210511194931679033o4ti85.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/997da71838d3c33b29d80abdf3d77821/44971748747.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a70c7bc0fd2---begegulut.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffb328fc5d---26664473666.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/13b1c9b106de97c5cfcd14d039f9c5c1/kopomumefosefigikiluli.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=8.4+areas+of+regular+polygons+answers
    • 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_off0000df92.bin
c38a43c54022c998ddd865976aacf99ae25609c9894f7d3e8fdc5120633b1ebc
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF92 10900 bytes
font_01_sfnt_off0000f915.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 16792 bytes
font_02_sfnt_off00011127.bin
cea7d42ddaa64934425aebf6bddf16b952ff80062965ffedcb5941d39fdad773
pdf-font-stream PDF embedded font (sfnt) at offset 0x11127 17472 bytes