Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebab66f211018fff…

MALICIOUS

PDF

82.2 KB Created: 2021-09-22 23:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5ac7023405138bd58c5be496ab900546 SHA-1: 0d9b8b51262f515932be1805d272a96fce23b7a1 SHA-256: ebab66f211018fffe1b909bf5c0b7b714571aae878e5c54027ee2fe2f30ef041
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm designed to direct users to potentially harmful content. The embedded JavaScript likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://drafthe.ru/uplcv?utm_term=can+you+put+a+sim+card+from+an+iphone+into+an+android PDF link annotation
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/5e38ee0620e6da0663528875bc2534fd/manisokijepigagovawutazad.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/sigowepononezef.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/letarit.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/mozodifirole.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/29376376321.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/76b1a836dbaba6965fe3918c7bfd1dfb/66055078584.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/79206930105.pdfIn PDF document text
    • https://minjar.mebel18.com/uploads/files/35846972083.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/6788508394.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/xetepo.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/41095758513.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021091620104873499.pdfIn PDF document text
    • http://immopolignano.lu/images/kajuloti.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/guwurotigokezatopijezob.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210906_054656.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/99681890085.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/xigapavefu.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///76156549543.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/turupatanivodejirek.pdfIn PDF document text
    • http://ktcyy.com/ckfinder/userfiles/files/832418546.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614822a847789---jinexipajukopetilikusa.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/17919973074.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/ravajudidasebidozanelerow.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/12765314181.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/petuxami.pdfIn PDF document text
    • http://eskuvoiiranytu.hu/blog/file/matimudigodijidatitisigoz.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/48608727315.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_off0000db68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 17728 bytes
SHA-256: 93c6f8f608ff4e231ed169005682f00b7e5221171444bf1eb252ad42a39cf95a
font_01_sfnt_off000108fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12112 11084 bytes
SHA-256: 6345a43872cbbb37a0d6f3aa4e84bbc3a6bbaee05fa450d0273598d76938bc5b

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