Malicious PDF — malware analysis report

Static analysis result for SHA-256 addd460a33768761…

MALICIOUS

PDF

91.5 KB Created: 2021-09-04 15:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 27de0defd305101bb8a82294757ab7ba SHA-1: cbaef80c2baec8a72b6e1d7d6bc6f6b227a07586 SHA-256: addd460a33768761eed700ab7681b77f82955514fd23fb1363c2b3391168123a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is often used to execute malicious code or redirect users to phishing sites. The presence of multiple links pointing to potentially compromised WordPress sites and other domains suggests a link farm designed to obscure the final malicious destination. ClamAV detection and ML classification further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://ludifrance.fr/userfiles/file/34745469868.pdf In PDF document text
    • http://seamcc.com/UserFiles/files/53157336125.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/geluwajopajafab.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68b2a2120f---93446876154.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0s4dmdkgvircsv71j4l3cd2lt0/vikotejijanagazesumapofon.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/tonunixumanirexariropavim.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/90422494393.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/6ed8133bf01394e28dd0011492eab431/bamigizuwowibexuwijotoli.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/61121460143.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/j6phbdp2jt3fk9s93fmddg74d6/25743919767.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/13023878423.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/jiberazukode.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/90530354081.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/fowatilugoxet.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/borubaniwodimedululomitew.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/27769573767.pdfIn PDF document text
    • https://asi-filter.pl/files/file/11859324731.pdfIn PDF document text
    • https://hmradiatoriai.lt/images/files/rafisagaxurezupoke.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed831b961d---20650577427.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/f3334028cfa4b7aa577f138ee2c7d199/63234822287.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f9fa4151c---jolodumijurixe.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/felokodegizinu.pdfIn PDF document text
    • http://crackershrimp.com/file_media/file_image/file/lifogilotixixi.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/d276c22fb8e88ff6541ffb0d8ee1cd24/44632751654.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ebook+gratis+a+coragem+de+ser+imperfeito+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_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 19456 bytes
SHA-256: 1ba4e48138709c46ca4e010f4b215fa857a8b662b34f40bb5cf67fd0a76f45c0
font_01_sfnt_off00012eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB7 11028 bytes
SHA-256: a7bc757067996a52d03d0a0f4d2a4e1820cc2f73f712e225156e1f338cacc1b7
font_02_sfnt_off00014810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14810 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1