Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02526bb5e6eaee2…

MALICIOUS

PDF

70.6 KB Created: 2021-09-26 13:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ec000f2de7376b3cded5341ae1e98a59 SHA-1: 327ba28a2b4178e57460b16ad5750afd45ae6c7f SHA-256: d02526bb5e6eaee27a9ada66e9c0a2b2665194d761cd9539aedb4b7f43cadd1a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, potentially for exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=play+store+hilang PDF link annotation
    • http://isemya.by/modules/ariol/static/ariol/ckfinder/files/xojugeli.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/55251445033.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/xawuxiwobijebixetuxek.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/12712921607.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/xukomasoliximotagaz.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161470fc8daf49---xepibogaxofisiwakojib.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/rojuwubabedokuzenof.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/a4b4f6c7eb8802be4c5a6dac7d28853c/poxigelulakuxuwomubabedum.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/fuxuwosoz.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/lisinimisagozot.pdfIn PDF document text
    • https://limsurempat.com/contents/files/39532399018.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/64151796806.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/12485478881.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/begamamimimapebanug.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/53963315436.pdfIn PDF document text
    • http://cauthangdep24h.com/upload/files/zawaxexalifumowabeve.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/70917005325.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fd846ad02f---tilebogabewom.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/82717355704.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/57876590146.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/5c21c02702942599daa5d118a8a55548/farorakivozegepez.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/tedijixifamuxek.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/rofunevagof.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/nogon.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/nawamegipetox.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_off0000b54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB54B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD62 10500 bytes
SHA-256: 49d0f3d12c745ac6c1b6b25ffe3e7de6b890cc136bae2f26ff2c6c1db52e0fb7
font_02_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 15468 bytes
SHA-256: 877985cce2206cd3b7e62bcf68d7557dca8337367692675b93974d6b6cb500c1

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