Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7cf095a703eb7b…

MALICIOUS

PDF

79.8 KB Created: 2021-09-07 05:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 99da025561c45faee67a68ff7414f431 SHA-1: 02bd3ebb70f86ce71df08f2f4a3136ce682c71c3 SHA-256: 7a7cf095a703eb7bc6bd8a61da0428db35355cd9176bf2e4baa4eb106a73a715
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to other PDF files hosted on various websites, many of which appear to be compromised or disposable. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests a link farm designed to obscure the ultimate destination of the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5466

Heuristics 5

  • 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
  • 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://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6951173bf5---61151581399.pdf In PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/jeguwavomixibadi.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/nodixefovajekuletil.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/9c9612581efe179a64013195f8bbdaa2/sesopexudoviferijisar.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/momukixukavim.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/b0e57fe60570fbd0dba7b3544ba48d09/paririnakudifupa.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/gajefanazoxagad.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/75af90bfb3554b228fb2a351f1954d1e/najenekazugigiv.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/51929451575.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/8ae9a739784fb1053f6c00cd94586485/wunirekiwimugaramovoxi.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/ranaxukesuporiw.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/xumoreded.pdfIn PDF document text
    • https://mountmoriahcamp.com/media/xudixikagafawabekiperov.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/64f5fcb6c60ac9b384ad8591feec8278/73753538145.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/demumikuvepifidu.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/janisubemukilimo.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/rabunotutamoposejip.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/kutob.pdfIn PDF document text
    • http://gzperson.com/uploadfile/files/60688516554.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/75084116543.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16076700806363---26046984490.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/legoxijolidasevo.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/phgmga1n9159klh1i98qkpku3k/viseduboxalepomufuzab.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/lanogekibanefibupaseb.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16108f7ce9aa1c---lujozekazovameledowiveru.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5f8674970de4aa2c90f069febab3a659/2412043969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=catalogo+cklass+2019+con+precios+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE459 20516 bytes
SHA-256: d465bfcd2995a47cc9a27cc4bc43b3e01f796f260648eba6ec52ffecf6ed0deb
font_01_sfnt_off0001195a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1