Malicious PDF — malware analysis report

Static analysis result for SHA-256 969fcb626b01070d…

MALICIOUS

PDF

81.6 KB Created: 2021-09-03 03:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dbb38da0daaba50ac7ce0187f9a95270 SHA-1: e999b06280e7dc43677355aeadc1293e2028f19b SHA-256: 969fcb626b01070dc3623aa0319cc7fba24ea8dde50be755e54ac6470908f16d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware hosting sites. The embedded JavaScript is likely used to facilitate these redirects or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 https://huntic.ru/uplcv?utm_term=glenn+miller+american+patrol+pdf PDF link annotation
    • https://byocamacho.com/ckfinder/userfiles/files/26461612888.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cb53787e01e---80662681962.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/0a367d0f31b9efd6669af64cca3aa1e5/tivuz.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612bdc5dd2178---lanusive.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/desobak.pdfIn PDF document text
    • http://ashioke.com/images/library/File/wetevikojabovufupipukivud.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/22163389846.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/kijizumivomut.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/mjb9957pcg54g6ql3pc3nqkt2o/37791375604.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/nagatagedisif.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/5000b2b6a4a0c541bb235690b0d77fcd/82443672457.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/gojed.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/donobatofexepaporol.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/bulovuko.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/80083609122.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/xuganof.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/93219554083.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/zezojutudokesivozabozege.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/gogk38k9ovv7ql3smej1tgp9db/kotivuvuro.pdfIn PDF document text
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/lesurexejunedefenevaluva.pdfIn PDF document text
    • https://ivanamihic.com//files/65855416053.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611e48ed75054---dutozarasenixojanalix.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/dc145081c5800e9b345bddf554befcfd/zonolavedasazivup.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160d7aa2053aa1---gipareruligonagujud.pdfIn PDF document text
    • http://m2m2design.com/userfiles/41857262215.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161007299e4713---desepuwusufegimu.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/97901200349.pdfIn PDF document text
    • 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_off0000d8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E4 18360 bytes
SHA-256: 2a516525405162d01919c22fd8e3725710a886febea9ca4cc44be60b3179da7c
font_01_sfnt_off0001085d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085D 10652 bytes
SHA-256: a9d4035fd7ce7925ac047a2d06241cc1a3b2806d53d13a106a2651fd33a62aea
font_02_sfnt_off000120aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1