Malicious PDF — malware analysis report

Static analysis result for SHA-256 22afc94ed8b355e2…

MALICIOUS

PDF

73.7 KB Created: 2021-10-04 11:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d52396d71903f6b12fd7a57debb637e4 SHA-1: 18296acf4d82101bfd0584ad6d1d7dbd7fec666d SHA-256: 22afc94ed8b355e2f348b6928c6da9a3045f20f2beb8341ebf2ab8a4c0adb192
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary attack pattern involves leveraging these external links to deliver a secondary payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://colorsoftexas.com/ckfinder/userfiles/uploads/92102938728.pdf In PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/50401588284.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc671d365a---dadebibolilosoz.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/eab41f8ca9a2149f464623a960d778e7/wumubolopamogisigupaxefuw.pdfIn PDF document text
    • https://ripedzn.com/app/webroot/files/fckeditor/file/sugizexitupobetumiludut.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/ribidazazepar.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/makanewamokovirazujuka.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/livapujane.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/kekonomugojijogofobe.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/92237573809.pdfIn PDF document text
    • http://spreewaldpension-luebben.de/meineBilderAlbertGrundschule/file/jemeteliganuga.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/49774695217.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/21890355823.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/mekazuredupotumid.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/63004699518.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161461a7b6ed05---45521505878.pdfIn PDF document text
    • http://yuha.be/_files/file/rugafepijodaliwuliw.pdfIn PDF document text
    • https://noddy.nu/images/file/16818150772.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/d14b9b9889047329c9180e37161c319d/nisaxatejovuz.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/64718988889.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/faputoxagususo.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/nurikobaravawajodoxineba.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/60594328977.pdfIn PDF document text
    • https://2winit.com/Files/files/13629726602.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/66204429345.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=good+deeds+good+thoughtsPDF 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_off0000b864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB864 19616 bytes
SHA-256: ec1931fc63456cea06e9d5cd51b55152bab7f078d0bf826f5e1c3ebe4d9cf83d
font_01_sfnt_off0000eac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC9 10160 bytes
SHA-256: fb1d67da40ed5221e4ff0dc7dc6a6dbaf6691dbf043a97422193f427678416d1
font_02_sfnt_off0001017e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1