Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b43847f7966ae02…

MALICIOUS

PDF

85.3 KB Created: 2021-06-27 06:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 345aad9a80d242a25aa7b1757c6acf5c SHA-1: 123c28803803bd8633ec9142613e570cd12b8a97 SHA-256: 0b43847f7966ae02f88d15ca7b1fd9272114c04d6322467e4b26d12d9bbe90af
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be instructing the user to decrypt a payload, likely to bypass gateway scanning. No scripts were extracted, but the overall structure and heuristics point to a downloader or dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891dbda0d48---bazol.pdf In PDF document text
    • https://bdaudit.ro/userfiles/file/mikerukize.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cfaa0ced33a---81375808770.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f56ac152f---85216850116.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/f3142fe8723f2c694ae59be482a09e6a/xotigudesunanufokufal.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160831746e3b63---71812234466.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/t90t1iugel4tm7g9h8s6ao2db2/dalewodazunowinevoda.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/sakalazubinutibexeraveg.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3a66a59ff---zosifowagivurazidubidoruk.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/pebifolotatuvazuni.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/wofimizojekisiroxejanes.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/f5b8u69c6e24q5492drsh7jiie/13960128526.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/86231bb8ab6d80ae7ae054630873a9e4/lovafoku.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4f7211501---53492386113.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608434e78c741---50399357594.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/e88e240f6b4f3adc0f54f7ffdf8d4669/tituxoxedabawiwo.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/puvilu.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcf6191577---ramasexinolaf.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210616_821A5CD6FE22CADE.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708c8c923ac---72046551793.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/10808546143.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b4841c8a0---pedoloxinonanawuvexokugo.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/l93vhl2d96qceca2sh5h2tek0u/28071488109.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=internal+strengths+and+weaknesses+in+strategic+managementPDF 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_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001039a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039A 10828 bytes
SHA-256: 8386c39fd469bef94b62042b61b2d8245758cd7efdb00dd727b030112477851f
font_02_sfnt_off00011c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C36 16084 bytes
SHA-256: 5ace5fefaefc5ec0a46fd3a3bde3fafa504f7429a9830846f3446c1714814cea

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