Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93a856b098383c9…

MALICIOUS

PDF

73.5 KB Created: 2021-06-29 09:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 766360737a006d84da4e8a3275eedee3 SHA-1: dddc0bdb7c52fb87ca78f3b9f4bb03970cacd79b SHA-256: b93a856b098383c9be53228685a57c49e3b4d0793e393036a9345421ecd98584
96 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites and disposable hosting. The ML classifier strongly indicates maliciousness, and the link farm pattern suggests an attempt to lure users to malicious content. No scripts were extracted, but the primary attack vector appears to be directing users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607bda868e8ad---63566906508.pdf In PDF document text
    • http://geose.ru/userfiles/file/38692964376.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608129efd27ac---48395445705.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609483afa8ec3---kavoxevasojudexutafi.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/7da7f9e9a3be6cf365ca5a6fcf79ac0a/nukan.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750f3e8903e---furapirowisetawijotixu.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/56006882747.pdfIn PDF document text
    • http://chongros.com/userData/board/file/34899829018.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/20f021dc086f00637b7de8f85a8346e3/kezagutukavadojekika.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/mawatiketikazewi.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/mugakokedunesowaxifeva.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/wakeguxeforomafe.pdfIn PDF document text
    • http://midel.me/userfiles/file/82299596253.pdfIn PDF document text
    • http://abpaluso.com/upload/file/47200737807.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/padekozufu.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/3jcdl25h76vul8rrna189p01tc/ralasapebixe.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/5hbrvprn995lh7rfjjsiifih9f/34393586618.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/76238033212.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/93389507311.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/rigifazizetoxofob.pdfIn PDF document text
    • https://lbassicurazioni.it/file/33659130345.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210625190324712.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af3daed8e9---67090679057.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/1f3b9c080f78197f11183ab775d1131c/mosawo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=wais+iv+administration+and+scoring+manual+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_off0000bdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAC 15496 bytes
SHA-256: aca6a47500f8cfb102706780dcfe5c6f089baf21a0e878220278d532d2348513
font_01_sfnt_off0000e581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE581 10988 bytes
SHA-256: 29d0b70cd62493c6b436af8e852b4fb2d7306a5a3308bb2c59f7e6cd1649502a
font_02_sfnt_off0000fed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1