Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b54ba2980f9625…

MALICIOUS

PDF

89.0 KB Created: 2021-06-26 03:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: effbe2c5efdff545ffc5ca707285b07c SHA-1: f4aa2cd32beba1f37c026a4de47db82437f6a930 SHA-256: e0b54ba2980f9625c1f7eeb756d4508317af9dc3624fea60f7074eb3938ac8b4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. The numerous external URIs pointing to compromised WordPress sites and disposable hosting suggest a link farm designed to obscure the ultimate destination, likely a phishing page or malware download server. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=olympic+archery+target+distance PDF link annotation
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/kocuct5bvqko4beem2n1v867jk/nedepepamamafaletolikev.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/42906071451.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/zatam.pdfIn PDF document text
    • http://limitlessillusion.com/wp-content/plugins/super-forms/uploads/php/files/1dceca1bc432608c627a33b0fbbf3e50/42351993096.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a53dc349f---12888548410.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078a77059690---59820755016.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607510cf5954b---wikubogaf.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/67483816983.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/samiluxaduxotajomawuguje.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc22a65937---duwevexotejit.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/29e8303226590f1bdd90dd3718ec0949/72696022005.pdfIn PDF document text
    • https://birudongker.com/contents//files/5107690789.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/acdd2855646f47aebf666fb851cfb8b4/vemuduziwegujupe.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/vukoxavidejudetura.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073f1eece211---71397678439.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/fotibowudekumamofirinogol.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/c20e4d4ccc1de30fc31dd4c62cc75a7f/vigon.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/mj8mq3rt32klmohr24tv5vr0u6/pubirob.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/da59314f0b3cef07deea3261a470b10c/gotasukegunuvikivelogab.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ck4ivskk13u3rkbrhael1rrnm6/9231123315.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/2030950238.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/65093647913.pdfIn PDF document text
    • 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_off0000f93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93C 16472 bytes
SHA-256: 14b5a9ce2f5ca6bca26f1c2cffbf96c03f59412fad267b0388e3c7892483ea73
font_01_sfnt_off000123db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF2 10980 bytes
SHA-256: b55654cbe38eca1b77cc0348b2f45d969f1f031e6105a2dd2b0c43c4b8d26b49

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