Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc06d5b35149dca…

MALICIOUS

PDF

92.8 KB Created: 2021-09-04 04:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2060f3a78b5eb20feaa55f4a96c39da7 SHA-1: 15fba0b682b224d817a0d7a3bec163d81cc871c7 SHA-256: 9cc06d5b35149dca84cdd5c123e2ab62b2a79e1ee4c30aa6e751cb3bab51827b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed for SEO manipulation or to host malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the structure and URL patterns suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://medob.org/SITE/files/editor/file/xopekunogiraraworosatix.pdf In PDF document text
    • http://sowiik.pl/userfiles/file/musajiru.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/vekikojowaxazaza.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/fawexapumi.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae3595785a---xuwameturibenemoreravoriw.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c125555fa0---9260800182.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e5b78a640674725bdc9083b6e13f064f/futapef.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/tubeketexolezusekesukaj.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ca7965018---68325831864.pdfIn PDF document text
    • http://minerva-collection.net/files/files/57467857099.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/jitifijufitu.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090cac407f30---12504346358.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/8urb219hjgam5rnn876pc325oo/wakazuvabukaxuwox.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/legaderu.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/93841ca6aef4927c6f1573426db0ebc4/29291085228.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/dusuwa.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/asj0g64vupmog9pq32o9e5se05/71456574401.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/mafitolijobuxolufagigam.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/lemunene.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d20d8d5fac---55709835522.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ac93bfd95263dca54313d3c409e4800d/jobudonagajafofajegi.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/ledaravakupelem.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/xawek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=pioneer+vsx+lx302+manualPDF 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_off000104d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 18004 bytes
SHA-256: bb045160040ae7e41620d9d5daa85f74fcfd5e25ccc8f8c83262a445bfe23ac1
font_02_sfnt_off00014c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9B 10856 bytes
SHA-256: 2e3c251cff7a9e60c66d56948860303badb86b8dec4413f39c6c8bd2df7534fa