Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fdecbf466e7eca…

MALICIOUS

PDF

73.4 KB Created: 2021-09-06 11:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ecc70be9fdd406e78871c5fea6898d98 SHA-1: 308edba819d0bed306818f160fd6377530adfaec SHA-256: 69fdecbf466e7ecada0985792bb041e8166f3ed2dcd1deb1f19a65fd63f92dd0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106030736001141.pdf In PDF document text
    • http://bwlpsalisbury.com/uploads/files/11983804211.pdfIn PDF document text
    • http://rilta.net/userfiles/files/nutabezirodetufiwol.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/c3865b2641821f7f0c63008171c9fc81/wetexomuda.pdfIn PDF document text
    • https://jagamimpi.info/contents//files/90549320795.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cae26e5a8---kemoveme.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/sixoxuxukopefazosezatabam.pdfIn PDF document text
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/lezunikobedebi.pdfIn PDF document text
    • http://civicwomen.com/ckfiles/files/82786641699.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021070622045580554.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/9ca1c221d5e4ddbc1c7c05563122239e/51631690526.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/lakoliw.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/ece641df7e38938759c520ae6d87b407/18431681735.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/xovofezazagijedusatede.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e57b2deb3---sasoramiviwasowuva.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b979ae15ae9---94909996564.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161053aa59c47e---5938126465.pdfIn PDF document text
    • https://summit-christian-academy.net/scauserfiles/files/reretiniximuwesukosi.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/14169212913.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1be7e0bd3---85811792846.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa6143486---48334419820.pdfIn PDF document text
    • http://dmhfamilyreunion.com/clients/4/44/44eff64e497b984d8b2945277059c9c0/File/20378688431.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/61633493193.pdfIn PDF document text
    • http://www.fk-fudosan.net/app/webroot/img/userfiles/files/budadupipume.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/nevosabixanuxivatadafij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=breitling+aerospace+f75362+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB874 16796 bytes
SHA-256: 6c2180783065b82ab6225e3029590f734ef83ff632b8b94a6acf927cc848f194
font_01_sfnt_off0000e459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE459 11620 bytes
SHA-256: 72debfedbde381aff6f38cb79209b1111f1dbd1b5301f57747af68338a27025b
font_02_sfnt_off00010021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10021 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1