Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee2a56f446ecdc2…

MALICIOUS

PDF

284.5 KB Created: 2021-07-16 14:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7d31cb77cdf38305f33e9fe4a9349ad7 SHA-1: 914fc0df4bbe1d7713046419e833fb46caae9efe SHA-256: bee2a56f446ecdc21d684c27bb95b004ae7de0d33954309c5a087ef7cb3f1dfb
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites hosting other PDF files. The ML classifier strongly indicated maliciousness. While no scripts were directly extracted, the presence of embedded URLs and the heuristic identifying a 'link farm' suggests an attempt to redirect users to malicious content, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9759

Heuristics 4

  • 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.
  • 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.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af001a89c9---75954758726.pdf In PDF document text
    • http://mav-auto.ru/images/file/70031985495.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed026b1710---39193657951.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/24594989989.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42d885fe6d---zefinavifupibi.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074675d30d8e---30064797438.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/1629eef8ffa76481a9e4c3f5bef6d7af/kotapuzaxipijukubanefun.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/37080656907.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/57302221158.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45cf1d081d---narivibutapa.pdfIn PDF document text
    • https://bursac.net/userfiles/file/17071914794.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/bufoz.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb66dbe086---10109002473.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/aa9e8905f5d56d772ae0990dc994e8ed/25949930871.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbf7174e46---mexevawinubexagox.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/u68sdan8l9g1hi3926vm6nlvq5/81156904278.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8146633f0---xeminisugixosigusu.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/xinobixevukufas.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709e6b03a2b---nigaxipa.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/20662546260.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/gcgs6u0pcgq3da411jg1i1dcv1/65363506703.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/38345807692.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/28983690816.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/75796772744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=types+of+audit+working+papers+pdfPDF 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_off0004025c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4025C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00041a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41A6E 18008 bytes
SHA-256: 331100ec030fb272ca097f8dfda45dab7ae39a480afb2502a3e50a561290908d
font_02_sfnt_off00044a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44A22 10980 bytes
SHA-256: 1b1656ee6e0661d7adb16dd05a2f6151539a6c23983ef8b39e67ba53408008e9