Malicious PDF — malware analysis report

Static analysis result for SHA-256 54eba0bf3c329c7d…

MALICIOUS

PDF

83.5 KB Created: 2021-07-04 18:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e889c7cc25c96b3a5a231adeb94c66b7 SHA-1: 5324c38f043462e62484d23f75aee6dcd83b134a SHA-256: 54eba0bf3c329c7dcb733a0e3ff7f5c7a2c4383b506fc77b921e8c88b130c16f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bab43d2fe7---zugakatijojikegonido.pdf In PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/fb52377aece1b8dfdd0fdfb70a4721bc/fanurupokasonifotudubavez.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-5/20210505233342190807.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/365926546.pdfIn PDF document text
    • http://thedreaminitiative.org/Content/Admin/uploads/files/bowagewe.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/9bad2b72d96174c0adfbd016f9c8a278/silutejobizar.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/e78d063a617421541fb847a45b81dcb8/divumenefuropatovuwotijev.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/bedofatujemulatebiga.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/zeneviwud.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/d9d8c7e0d5c1a13bc412a56eef0dbbc0/39140304623.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/bi1itjndlb0a44im97h0fic5l1/ruvigojemugejifox.pdfIn PDF document text
    • http://nutrisoilvietnam.com/upload/files/4877191751.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/fubcdrkn2q9cp15iuv3vki1ush/majanitezutukagufoxipeba.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/piniruduvasunutu.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/xiwexodewovo.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767d2129984---16417212296.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/60d811db580ea.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084544905ab5---xudasujanomerawefoxebawiz.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/0950152043ee3c5d480937aabe18dcf4/marabuboduf.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/zowerosipenaruxadomupa.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865550dff58---nixevukesaludizeramuj.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/22216315809.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/f880fb7f68536564718a574c8a185eee/murefi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=rabbinical+college+of+telshePDF 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_off0000e16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16F 17616 bytes
SHA-256: da66bc59d08a4948948f78bc4931ae2d36dc6e747f63fb41c314901ba61dff53
font_01_sfnt_off00011013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11013 10700 bytes
SHA-256: cd9163a3b2bb61799286b2c151c92cc0cd0ea9e0bc6d7b14924b9879ab9bf797
font_02_sfnt_off0001289d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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