Malicious PDF — malware analysis report

Static analysis result for SHA-256 e466662b8b355054…

MALICIOUS

PDF

77.0 KB Created: 2021-09-16 02:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b6600292425c4fbdae8f6d3988ecfef2 SHA-1: 7148d86926f56d7cb12d4e6703039464a8415f3e SHA-256: e466662b8b3550545059f42d82cc18094dc3437688722a3087e8ed139bec76ed
156 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to various download sites, masquerading as a source for 'minecraft cheats download for android'. Several heuristics indicate the PDF is a link farm hosted on compromised or disposable domains, and the ML classifier strongly flagged it as malicious. While no scripts were explicitly extracted, the nature of the links and the detection as a phishing trojan suggest an intent to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 6

  • 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.
  • 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://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/tapizuxinodigusex.pdf In PDF document text
    • http://dar-tom.pl/userfiles/file/76087824772.pdfIn PDF document text
    • https://www.educationsexuelle-ecole.ch/ck/ckfinder/userfiles/files/kanedusibaf.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/q54slmune4m8k7abb5052btn2n/puburigasudowog.pdfIn PDF document text
    • http://machin.kr/userData/board/file/jawiva.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/benami.pdfIn PDF document text
    • https://signika.pl/Upload/file/bedofatexo.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16136378b98aba---wepor.pdfIn PDF document text
    • http://sakem.org/userfiles/files/dadonomipokexuxatuwusutip.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/fupawuvukefirorut.pdfIn PDF document text
    • https://trisyscom.com/userfiles/file/rozunopabijopamusikeli.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/namumiwinut.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133e013369d9---bilukazunarolefatose.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/noguzujubamilagafatos.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/96820879946.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614216361da3e---pewenekevigux.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109100038387691.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/81405853692.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/56282640072.pdfIn PDF document text
    • https://webaprint.be/img/file/36567098689.pdfIn PDF document text
    • http://protrialse.eu/files/files/811165988.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/28of3fmsehl6jt0k6big97fhjl/mawefuzowifilat.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210912_215905.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/kizusomosotuboba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=minecraft+cheats+download+for+androidPDF 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_off0000ca52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA52 10652 bytes
SHA-256: b51f4d9bf96cfd295a93d3f7bffb2834eae3088ea5eb6fd44794972050403db7
font_01_sfnt_off0000e2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B4 17156 bytes
SHA-256: 0f510cc65ea3880c7922f2e04f494e8a153e205f449e956ee60a97bf7372d185
font_02_sfnt_off00010e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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