Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e75f2709d40f3ed…

MALICIOUS

PDF

86.8 KB Created: 2021-07-18 20:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e77b72daa1fd9b0ae832ab9fd3d8531b SHA-1: a357e9849b62e58e064e45d135a704a374f17278 SHA-256: 8e75f2709d40f3ed8d88cf5be588954c0f20f29aa0ff21330c443347ad93861a
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded links, many of which point to compromised WordPress upload directories or disposable hosting. These links are likely intended to redirect users to malicious sites for phishing or to download further malware. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d139cb85a6---dagetuvalipibopupif.pdf In PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/251747e0de008b302a23817c380b0271/80704208168.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab4f2ae291---62725475023.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/9ba15ca8a0e3d593ec137315a77cd006/24052562649.pdfIn PDF document text
    • http://vodnik48.ru/content/file/64723094106.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/8235795126.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/bh90c8hj5cjqq1olk11frujlm2/kewarozadepubo.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/13394355760.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/2d1283dd2132b10047e79ef9534128b3/7684336030.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb9d127053---kazulodudimokegadodun.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609851857cff8---91203973378.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac39e6e9c21---9811348191.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/54503054502.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/54756067186.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/fec23e9f3c19e247db3c4c56487b3771/rowukelezavefobesi.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/waxejaku.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16070a7b18c3ba---19825444296.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/85777863840.pdfPDF link annotation
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3e7d4cddc---17127851604.pdfIn PDF document text
    • https://agatanorek.com/files/file/mazavivarozovitipogudedik.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/wevigadibapazubunimarela.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be75a3e23c0---doxalofutedeve.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f79d9d6601---9560380077.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/1fcfbd2b4e9bbe352d5b57d9d3021dfe/rivatedidefeduk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=are+elephants+scared+of+micePDF 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_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 10868 bytes
SHA-256: 48321aa7ecd6868d036d05e7c0b6a5e1fd4c7949121171d0ed98afa37b7cd709
font_01_sfnt_off000107f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F3 17764 bytes
SHA-256: 1588b475aeaa2b9ee287e10636834d687450972d3834d50fb598ee5cf5f6f22d
font_02_sfnt_off0001361d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1