Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c711f8bee9e32c4…

MALICIOUS

PDF

197.2 KB Created: 2021-09-07 18:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 52cd8a987e5720cabeecb73ff474f00c SHA-1: 04c2010c31d0fa6166ea4995ecce49ae422df94e SHA-256: 7c711f8bee9e32c4d3a7deb67b55a2945320e56903c0d39fcf21f2bbb9b79876
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the redirection to these malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9743

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.
  • 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://wastran.ru/uplcv?utm_term=contemporary+strategy+analysis+summary+pdf PDF link annotation
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/f3r3r6pe4o16jq7etpcens0511/27545666514.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/dasumiridodamemoketixeses.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/d27290c1a6558500b1ae53e7a0c1bf5b/86450029648.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/81335305148.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931ab1530b5---tizazoduzufosakulafipe.pdfIn PDF document text
    • https://tdfstore.it/file/dipazijubivaxix.pdfIn PDF document text
    • http://arablift.net/userfiles/file/bokuxoku.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/jomisolunamabokutozododob.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608597ac4efad---nedoxenulasij.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/39509647685.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder/userfiles/files/96645494298.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/memedewawakoxe.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/nabelewutumiruweb.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mitelemegenamuxerutoti.pdfIn PDF document text
    • https://storycycle.com/ckfinder/userfiles/files/84914958882.pdfIn PDF document text
    • http://9275522-travel.com/userfiles/file/morogavatepafaxej.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/debazav.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb5924095d---jenik.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160da91962352c---kafulipesavisakodazotewew.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/3d6beef9f92a68f944087833fca7ff32/19464072987.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/94733153460.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4ba07731c12ad92be8e8a0e3e3a1c4cd/66981618620.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161237d9e9af42---2316011931.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/ce28c0b92054198cf27d3475411d1be1/86361104209.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161292ca7245e1---zixanelisomuku.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_off00029da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29DA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002b5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B5B7 11084 bytes
SHA-256: e2ced9b6dad314112dda80ceca7b6fb50b012b8ab62e31612ea6623544ea5053
font_02_sfnt_off0002cf5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF5E 20668 bytes
SHA-256: baeb2650d71a5079f400052646f2907d634e65d1eedb88468451b28ef24973fb