Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3000295d1da7eb…

MALICIOUS

PDF

70.5 KB Created: 2021-09-27 03:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b22ee798c9bb68e8e4c7ef2d3f7f81ee SHA-1: dc10c6a9676ecc2c4800ecb24d3423401d8101c4 SHA-256: fe3000295d1da7eb4bd0617d8c6d223ac4eb5e58d1233e88458b2f25b48d8a4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous external URIs and links to compromised CMS uploads, suggesting it functions as a link farm or redirection mechanism. The presence of these links indicates an attempt to direct users to potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://philabc.ru/uplcv?utm_term=animal+crossing+wild+world+ds+download
    • http://thailaundry.com/imgUpload/files/14296046858.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150eec3a3f7b---wobag.pdf
    • http://ntep2008.com/UserFiles/File/10171017294.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/94092d8e892bec1e039dc0639566a730/26408042664.pdf
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/63962065077.pdf
    • http://kutyasturak.hu/images/files/39835880332.pdf
    • https://www.tristar-technology.com/ckfinder/userfiles/files/75911558536.pdf
    • http://turatabor.hu/media/ginigu.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9fed60f0d---wewusolajawexagobovurun.pdf
    • http://dinskayarealty.ru/media/file/5206619803.pdf
    • http://getem.pl/files/file/71459740429.pdf
    • http://dirpub.org/editor/ckfinder/userfiles/files/xupobegejatedoto.pdf
    • http://bukharajohnscreek.com/sites/default/files/file/98551730829.pdf
    • https://eurochen.com/UpFiles/WebEditorFiles/file/35455674596.pdf
    • http://ticketsperiodico.com/galeria/files/74716312878.pdf
    • http://intertermo.nl/userfiles/file/34028930370.pdf
    • http://yjeverspeed.com/userfiles/file/11259800254.pdf
    • https://eseninternational.com/uploads/files/furalasujefuborupinotorox.pdf
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/jozozoja.pdf
    • http://shopabrang.com/images/files/likiza.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613d55fe92971---xibaligidujegogixadutiveb.pdf
    • https://www.borzabadi.com/ckfinder/userfiles/files/7703953370.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ec5e92f61---10113661228.pdf
    • http://ferrocom-spb.ru/userfiles/files/71421795785.pdf
    • https://www.fangjin.org/ckfinder/userfiles/files/sabugozudol.pdf
    • https://alquimia.in/admin/fckeditor/editorfile/97743925558.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b520.bin
9cc2596ddba1ef950c336dd03244fb24d0e44c5baaecaf41e3e02b7d0da4a949
pdf-font-stream PDF embedded font (sfnt) at offset 0xB520 10548 bytes
font_01_sfnt_off0000ccf4.bin
bbf2722afaa83f75d5a211016d3f30413cdabdcaa1b661734df733b74b2ece61
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF4 15304 bytes
font_02_sfnt_off0000f3cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CD 16792 bytes