Malicious PDF — malware analysis report

Static analysis result for SHA-256 241445444b5366e7…

MALICIOUS

PDF

79.3 KB Created: 2021-08-01 22:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2342abc97b7f951ab7afa4c6034c5aaa SHA-1: ac239b68fdb1d884987fced33b326176270be0a1 SHA-256: 241445444b5366e756f6d40dbb3e10c835fec6581a4dd425ddce0ec779503e22
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm or phishing lure. The presence of multiple external URIs and compromised CMS upload links indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://lighthouseofworship.com/clients/44803/File/3991612447.pdf In PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/e2a8f1e44d453affcb417b7f6104c4c7/kupuvadamumazatuz.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/tijak.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1610369be00ff6---tawekotajur.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/51872533535.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160849bf11fbb8---85822186904.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/gfj8rkpv8i7dbibb6dsgq7aqa1/lavitolukomagavaxojubisi.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/3bf2434572ee5ee4993bb5171f765415/tuxonutufabololirefer.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/masubiwaxufaparamepo.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080f9b401ba2---bikovemafelobagomagasol.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/hbdu20olrrcnlk7803m9l398qh/4639839060.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/lirilejasunirevikaxejesa.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/tipibogoxi.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/mcm00a5hns1lcmgsoko6tm6t8p/vugekodagoninosupufebevam.pdfIn PDF document text
    • http://houselandia.ru/files/72815957411.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/377af8dda7942ff3691b70d9064c7e2e/17731501460.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2645ead4---mogeroke.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077572a650ba---72441370461.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/tijupapumozuretesabidimim.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/47249763499.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/45523281567.pdfIn PDF document text
    • https://vinacomvietnam.vn/uploads/news_file/17039288549.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/jiwunavafapawo.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/28433393910.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/su28n0jg73kt57ka8gfec0rq27/86477273427.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=bastien+piano+books+pdfPDF 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_off0000d1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BB 17300 bytes
SHA-256: 6524047809f260650fc650a6c0a803f5c1805b9a621ed61022f93c06a4eb5f9b
font_01_sfnt_off0000fe9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B2 10628 bytes
SHA-256: 3380e58e16eaa87f85f5baadd62d45855862cfdd769f2c22649f3d593ab082a8