Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b32d3c4433c6a0…

MALICIOUS

PDF

101.2 KB Created: 2021-06-26 04:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1ac629e35a8e742913e86c5d8fc208fe SHA-1: 23c9bb75fd0065302b6e94469c2eb5659bfe4df9 SHA-256: a0b32d3c4433c6a05f62c07315d8f79a3afe944ed577e6fe132bc583d8f77be6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/4e8dqi2e2f85i87kmit04ml8me/86204155203.pdf In PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/84549818855.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/nudukiwopafe.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16086c4c33e755---18663740419.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d9c4986e9---wazunumebebatisidoz.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/87563272047.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/komokugad.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ada955613e6---durivamusujudop.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/ashsnca9f9s2v1cugthinlms6k/26222814489.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/a5064d41c91316a2b0afe2a9fd433209/3646469460.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/valukiwe.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5sksit8nq8mbi1h5s24sab54n6/samopiwuwajisuvoporeb.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a1abe11ad34---97814356713.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86d5b5f078---23195122332.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/ac6130f2bd4f0a0f5de634d68c34a1ff/bejoleravesi.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/7438382a083047214e459bf68fc4c5b8/zawiwe.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071166c17d3c---79931566375.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/94292327412.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b80a328003---88166812304.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/remunuzifijasuna.pdfIn PDF document text
    • http://hf1968.com/clients/48820/File/mavirorajuda.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a601549e12---41196789773.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/rilotebaboxedotarejiriku.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987ca022518---45804637199.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/58eefed9fb2400638e1b4497ab769db5/visos.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e62dbab252---90864531355.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=glass+exhibits+conchoidal+fracturePDF 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_off000129b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B0 10952 bytes
SHA-256: b158d288241c05cdcc3141a03b2fb9dcf486f0e83ac0ead0d36f99683dbf7a3f
font_01_sfnt_off00014310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14310 16972 bytes
SHA-256: 01eb4d90e720afcaf3d35d80a66686260b6c5b37659af69256cc5b259b30f7bf
font_02_sfnt_off00016f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1