Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2b6c76b6fe1a41…

MALICIOUS

PDF

90.1 KB Created: 2021-07-03 02:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d52a07c847d3c9d38112122fdeee839a SHA-1: f7dd81ee6ba94832b675a1e858c7644126426d7a SHA-256: ad2b6c76b6fe1a41fa4e426c11e0ab96e4537c5968937f6419e28418952cf5e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to unknown or potentially compromised websites, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://jodhpurtravels.com/nbloom/fckuploads/file/vobogufedek.pdf In PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078619b70edb---texagejutegijirigazes.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/35831099266.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/23975811578.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/hoiu38hfm42e9denodn5mr1njg/wafalujivelewofenuzaro.pdfIn PDF document text
    • http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/15317569479.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/bipokavesoxukodexofo.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/23308610168.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/64901876338.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e86fe3203---42403251339.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b7e4eb42f---lomorokitusufezit.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/86114713015.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ae127fa4e---tixinogot.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/f27df9145206d932b2b78e2d986075f5/70760252229.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/765c1c05a7fe9413ec184d08e4696051/26866826618.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/7259b64242d0a3f4460e120c6694c73e/lonejudoleb.pdfIn PDF document text
    • http://moje-stranky.eu/userfiles/file/runoje.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/kabinesudopabofemabepisi.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802c0b842fd---40158364000.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/eabb1ae3081ea5def25a297e66bb8365/59964208057.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/dgf2qbqldusv5ns33mcm7ocvs1/wavavafu.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/7407898804.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b409927429---17189068858.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/aee18d9608cf90750b6b7e3de2ff7994/35046591596.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/270f62b2eab1ce440443c88278743fe0/691985553.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=importance+of+energy+flow+in+ecosystemPDF 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_off0000fde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE7 10972 bytes
SHA-256: fb1f80b99a99e653dfe0c18133dbadd0976f2c7f35d4fcb3ae21009eb9b9510d
font_01_sfnt_off00011768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11768 16768 bytes
SHA-256: 59a99c013911e7985aeab8a2a73f68443c75be5c5fef5e215e76339c68f2f6c9
font_02_sfnt_off000142cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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