Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ff684ee1112275…

MALICIOUS

PDF

79.5 KB Created: 2021-06-29 04:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7ff9853eccd60a8917afe6db9752e89b SHA-1: 3fa1be3d4429b61d55ea5ed6c8c1c83dbb2fe568 SHA-256: d2ff684ee1112275eb75afd9210f00ef61fcb3a53c92efac42f3391933331f9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093da4c92d1b---liraditejaxul.pdf In PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ef7a2d584---62985782224.pdfIn PDF document text
    • https://coluer.ir/documents/file/vajafuralo.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb39164fb2---torawofiper.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/7732060498.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba09fba4b4---9375944003.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5882b6890---vebalazozanupukogebarelaw.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/bizevabalurixux.pdfIn PDF document text
    • http://contelex.it/userfiles/files/2722076858.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/99472134286.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/qlnob524uja7fi2gf2bsuvv3ok/92470452406.pdfIn PDF document text
    • http://meechoktoolmart.com/user_img/files/lajalozogufilikeduxikor.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/db18ceecfc4458d3c415d257c87b767e/45227583429.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16072b7ad4dedb---nuroxujuzukida.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/fagegadigulanifibazixe.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/2651591f8ab3e06ab07cf8ea863e2724/tulil.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/63431443683.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/d78e0ff47216cc56330cb4fa08360c6e/jopuwofa.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/0d98d6ea6cee7fe64bb9408e4fc21b4c/jitegijuxaduforagevosej.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a37a45e6e---pileko.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/44885r2vatm35t6a23rc2229ad/35628348031.pdfIn PDF document text
    • http://1careglobal.com/upload/files/nagebimekexokarewagi.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6d130ac80---58841419979.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/4697755c6d3558c96542da4e385836ff/81208255499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=chasm+of+the+abyssPDF 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_off0000d39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39C 10420 bytes
SHA-256: 63ea6d2acb514bfb7a5454c050b936c34bde6bbd1b353f730a83db6f1fcd46ce
font_01_sfnt_off0000eb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB54 17460 bytes
SHA-256: c8f8261830a39c5e5ed8cac0bc85bfdbcaaa4c9fe1c51749c383394601850f31
font_02_sfnt_off000118f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1