Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad2387283e29fe4…

MALICIOUS

PDF

84.2 KB Created: 2021-09-20 21:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ec55ae51ebfcb3222c43e3863d90a1cd SHA-1: abd408367793c0db31a86630954d8c1fb354c0f9 SHA-256: bad2387283e29fe4841a257ff08bcc4ba964b6b81c5b59e19aac2ffe9af5b604
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • 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://5lovestartw.com/CKEdit/upload/files/vivimoruketometepezufi.pdf In PDF document text
    • https://divinenine.net/userfiles/file/kexafilirizubolurepizis.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/bafabusuzegivutovemesu.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/26855093382.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/tuwupom.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/8312cefb094411d21dc592a024c4e462/sexufekojipi.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/linebibojaxode.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16132537fc9646---nugew.pdfIn PDF document text
    • http://ukwoodrecycling.com/userfiles/files/12585232980.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/45239811176.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/5261704270.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/8254078893.pdfIn PDF document text
    • http://www.bandungmesin.com/file/tuwiwemasixi.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/115444a8c63d5cda761ee520cfde3d1c/zozigugapezopida.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16137986d51fab---kitujulajubugax.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/jejuvoj.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/sesowabamotetefevonuvej.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/o90p5car11fq2tqv6etksq76pc/99189874539.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/5494204768.pdfIn PDF document text
    • http://www.integra-cr.cz/administrace/ckfinder/userfiles/files/92328389657.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/21338079842.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/72047942407.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/f009956bf3a3b61b632c6340a7b01310/bokaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=the+quiet+place+2+online+freePDF 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_off0000e373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE373 10740 bytes
SHA-256: 554826a6d3cc5a451bdd8577620c7c1e075e974c95b7aab698a418b89b412a76
font_01_sfnt_off0000fc14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC14 18200 bytes
SHA-256: cb5003a75101cf9f0c38fa31775039b222913ede595b2e2e6ba38599b2b34a1b
font_02_sfnt_off00012b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1