Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ddc92bee2412e3…

MALICIOUS

PDF

192.7 KB Created: 2021-07-06 22:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4970706fcec376cad663006491c22ef5 SHA-1: 186e65f2ef9f82485ed02fc82bb0f2e79429f0b5 SHA-256: 94ddc92bee2412e3de6353cecd7b93a3bf0bece52e4c1168ce97c50917e9673b
96 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier also flagged this PDF as malicious with high confidence. The primary purpose appears to be directing users to potentially malicious or compromised external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9678

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://al-farh-iq.com/upload/userfiles/file/59180444343.pdf In PDF document text
    • http://charontrade.hu/data/file/doxul.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/202153232366586.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607568ee78209---puxupolurari.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160998e14eeab1---jubovovamiferofovo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cca7278114.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c185887ec8---kejisonufibi.pdfIn PDF document text
    • http://nadamasristorante.it/file/fototot.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a704da5ba3b---xawolabapenosubiburoki.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddedb42942---ratinelitupawawumuni.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160726b27ebc04---jagavukiligevake.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160827928f3be3---miratemigagexezadofu.pdfIn PDF document text
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/debago.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916950be2c8.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/gasutatajenuzexagurifaxal.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/3567086572.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/t33jjoq7aur4b6n46vnr34sfte/rofamugexikulutijekit.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/505u8mmebvg50uacoq4mdqamgh/9049722471.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/ragiwubowumut.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/456fa0bdf0bc76144a38b410d587c6e7/zoximafitesun.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/70606127844.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/f294ec68962adc1f63bf4f9c4d1c47d4/49481442201.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/694df977b6aded48864c6a0d6fe8c59b/wabijozowopajutal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=2019+october+us+sat+answersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF799 169912 bytes
SHA-256: 03b7c1e678f6e255adc57e75e1edd8a0fa163e424a4c8ecc39f44b3b553b94ae
font_01_sfnt_off000296f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x296F0 17020 bytes
SHA-256: 44807f1645afa1d33b48c4f9496760d94eb18c7515503daf059574c1544ed28a
font_02_sfnt_off0002c388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C388 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0002db9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB9F 10776 bytes
SHA-256: 5d520077b58f792125f80889b9638d06175cd9ba254ac45f74f69ef2bb2bf31b

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