Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c1fc95b4a5e770…

MALICIOUS

PDF

88.5 KB Created: 2021-06-28 11:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4406f49f0e4c23e9979ec300a563c928 SHA-1: 5e23c4884c4688298b8c66f8fc16653f8a34a5d0 SHA-256: 46c1fc95b4a5e770479927a6c82df14d4eff9ffd3941c12d0a562a54d719817f
104 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for initiating malicious actions. The ML classifier strongly indicates maliciousness. The embedded JavaScript likely redirects to one of the numerous URLs found in the document, which are often used for phishing or to download further malicious content. The presence of multiple links on potentially compromised or disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • 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 http://bluecars.pl/userfiles/file/92980876001.pdf In PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1d0b1e610---87697274459.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/5266309042.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/99968928915.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/c41e52bdc5ecdb6ee473f4c6e55024b3/12400546450.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/vibifirazixeg.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d7c374169c5---vogudawexobon.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2g8egkvcqngk4ug8dhuenpn9b3/penekurovavefij.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/jitalibegigexewubeze.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/94170310828.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b4b2b6b7d---fetap.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/bd7ed21ea85434cc2428aad9967c72ba/dapojevulobavoseziwonew.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087973e2fa95---20763775709.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/siup1oehf1ienc8ob1qld32kqi/8553037681.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b620ca35ffd---18955665340.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3aba574406---gesusuremusoseweliw.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/d6da4fd49ddbe9bfca98b5b7e6b7a90b/20095842687.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082acb951411---nunokedutoredufizopajek.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/7c9359ef8bc797657d0800b6cb1ab1a2/buzaleniwajoser.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/0581e910c1bbad1872dedece14c3a167/60917445186.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090805aded40---bomajagafagiso.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/fonowavat.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/boxabupuditarevisuzur.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/1b03f3d77b804d62a975247d9eb29909/86725896159.pdfIn PDF document text
    • http://tulga.ru/editor/files/64236186707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=elementary+teacher+cover+letter+no+experiencePDF 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_off0000f613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF613 17128 bytes
SHA-256: bb3310b716c360b3d46f012452b9511436e01110088706de654b05a3964fbfd3
font_01_sfnt_off00012226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12226 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3D 10736 bytes
SHA-256: cc2dab5dd24c71293199e6e4ffff69b38a402c82c018aa6d783ab526b7dc0d09