Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72a47015c0ef22c…

MALICIOUS

PDF

84.8 KB Created: 2021-08-20 16:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4547777f71085dc209b3e153ee53b79f SHA-1: 94bfe04d5ec12846ad34d1f5bb918a55fa78d41b SHA-256: d72a47015c0ef22c6440e9b405f7a97c4406ad7614851289de169cafe68539bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/lovixinemidimuvetan.pdf In PDF document text
    • https://samowar.ch/upload/file/gorubenozabaponivotumuzit.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/togot.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/70711745727.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/sikag.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021080713142473499.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/samuparewimopizan.pdfIn PDF document text
    • https://nusbetaja2.com/contents//files/xumezet.pdfIn PDF document text
    • http://mousike.it/img_ins/files/28153759599.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/rodoxenap.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/cfe9866f5c45e25e345172543fa3207b/80745494376.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/3977963233.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/c9blbn6p3i28oc75uagnn3k3u1/tujajupezetiloxitetofege.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/8d0745a24fbaa8653a1e3e66d86af8a5/7759698727.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/8887030850.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/ech0vaak757bmpiulenq0sd3j7/90479950676.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609670c7bd63f---dupupugojaropewaberatax.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202107file/2021072013543470554.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/76755783190.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/2sebccdc3pmiq1lbdovrej30fb/6061917218.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efef76b73d0---34696938042.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/42064984364.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/b9f1a69b7f76dee12e314ec0407f023a/39940883070.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/lolekuxomopejufazabuva.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acf42ecf9cb---lavepazirujibuteb.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/rakojazifabisosemosopik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=gravity+falls+piano+sheet+music+easyPDF 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_off0000e5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C0 17240 bytes
SHA-256: c5221a3f591f2312b56431b348f9ced0139f6ded2a0cb06c55cfb609e5bb8c76
font_01_sfnt_off0001123c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123C 11064 bytes
SHA-256: 53b77c498267c82574081a08c3cec3bcb86d7806b888b9827d6e15099537e5a5
font_02_sfnt_off00012bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1