Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f0a6132efc2b3b…

MALICIOUS

PDF

90.7 KB Created: 2021-06-29 16:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2d97cd7d27dec2b23d46c5eab127771c SHA-1: dded5d458c81ea3f142aafa82239dda1b76ea64e SHA-256: 20f0a6132efc2b3b7bcdb89c5faa0e6f73528d377d513712c2dc1d51e69e4203
96 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to multiple malicious PDF files hosted on compromised WordPress sites. The ML classifier strongly indicated maliciousness, and the presence of numerous links to potentially compromised upload directories supports this assessment. The document body is unreadable, but the structure and embedded URLs clearly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/lva1nmne8ot50k7q04aj134upf/tikosuriretamem.pdf In PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/j6646ism8hkvprqcv8ru7dj0u2/fojanir.pdfIn PDF document text
    • http://stasta.com/userfiles/file/22555596455.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/5437675e37c89f64e2f22ed246f2f0f0/16629091592.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c57f8ab19bc---desasula.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba2f917c2f---57710319111.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/94230983312.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dc0d9ff4e---56081223878.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/mm0bg0bg2gj3mjdur77ggv34h7/54774187379.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/95714482182.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/4ff39805f260442833ba4c7d63532ed3/16546936934.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a817a7d9d30a695186efdb9d2462c966/58145851391.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160920e4321d48---63597756881.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/a3t1iiq21d6ai070t6i41rfab5/kokebalosut.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/dfjnphik8jt8coctn10rfke8v6/60711105150.pdfIn PDF document text
    • https://rinducm1.com/contents//files/petubasixefifovaxifefujop.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2732838f80df5bcda170c3a540db2064/sevifimibelapegoserafed.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/b5b95de31d378ecf5ac84e958035210c/21286511377.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609742562affd---49422445467.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/62109285621.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac28c34ce8f---79424790796.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a835d1b5995---12583802828.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92889b8a00---8453322014.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/70684881681.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc4348c44a---kewapimefewelakozuv.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/jumegeromebusuxoweka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=closest+swimming+poolPDF 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_off0000ff9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9F 17964 bytes
SHA-256: 32f819fbc9e54f32575b02b86fb2ff9d4a591785706999e2b08088c6e42dcc6b
font_01_sfnt_off00012df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001460a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1460A 10452 bytes
SHA-256: a029e537dd342cbb1ab96b6c8c78e9105e4215983f2ad0a1d7f02413d23cd804