Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6a7c09ac54fcf3…

MALICIOUS

PDF

85.5 KB Created: 2021-07-27 11:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8fb7b722eec796a096db7dbc280ac440 SHA-1: 6b00fa0d072667d26990c17f75de4e724e3c67f7 SHA-256: 6d6a7c09ac54fcf35b3a30ba75971deeb23a746e74b0fb61a4dd59a7b01fef2e
96 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. These links appear to be part of a link farm designed to direct traffic to various external resources. The ML classifier strongly indicated maliciousness, and the presence of links on compromised CMS platforms suggests an attempt to obscure the true destination or leverage potentially untrusted hosting for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • 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://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/8814e51e7fd9354f612b407d2fbfffcc/63578310414.pdf In PDF document text
    • http://cablexconsulting.com/Upload/file/13770922615.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/volavekurakeda.pdfIn PDF document text
    • http://mariangelesorrico.com/galeria/files/43514163338.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/pemojumuduvemupipojuvage.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/xofarage.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/32007052719.pdfIn PDF document text
    • https://capecoralliving.com/media/file/23100957895.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/pemiwad.pdfIn PDF document text
    • https://avvocatoboretti.it/file/nupafopuxamaxegabunituwer.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/menevifezopoxi.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160804f37ce5c8---39348806137.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/710ed7df0a35f54f5494c5c02ddcdfc3/sezazamepemonujix.pdfIn PDF document text
    • https://okazionche.com/files/rabidog.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/f762u0qmfdqq23ln5bkdqgfr2l/mitaponalemasinagugokexur.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/2507553308.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/e0efbfed0d97d90b90205b18df8df2ef/bemaxukov.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160efe842c03d3---65653810769.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d9066b3a8c2---86244132667.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/81427763412.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8889dd2afc---71122907337.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/98998525542.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078e6cdb9359---pofefokuzedesedexigixit.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/77175924563.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/lda2dj7vjkk4ud12ish7pm3b41/kevupinusijako.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=commission+agreement+sample+freePDF 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_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 16408 bytes
SHA-256: 00488f603541c2ac39693ce24210b5ffa20830a8cac44dbbce4befbb71febe45
font_01_sfnt_off00011662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11662 10732 bytes
SHA-256: 0296b6ea0a0307004a89465eb3acd85f61f5e2da9f647092f1713e8e7a6da393
font_02_sfnt_off00012f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1