Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e60696461a1890…

MALICIOUS

PDF

70.0 KB Created: 2021-09-17 01:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 6047a87e6d89cdeaec0be801abe84226 SHA-1: 85958e5c4235475d460a02c14dc1a2b8bbd7fe44 SHA-256: 57e60696461a18903e2fbb2581cb29d9f39e8b8b74cc8e8f57047c3f615dbfc9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of embedded URLs and the nature of the link farm indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/pesusivunalosamolud.pdf In PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/c9f151e3590468a9c51d1268953efdae/37731562133.pdfIn PDF document text
    • https://stockbauer.hu/uploads/file/86170672143.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136685233614---80582150243.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/suguxex.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/61383459104.pdfIn PDF document text
    • http://sinosteelcode.com/filespath/files/20210910144808.pdfIn PDF document text
    • http://meta-min.com/files/rujasi.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/povunenojakiwek.pdfIn PDF document text
    • http://holzweiss.at/99051091643.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/rotewudalaritomuko.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/34771440889.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/29340383979.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/48757526658.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/49121587088.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/pifemitilimitogetufebe.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/161320a8b339ef---18222941645.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/42121930958.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/68474300545.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/xavimalevelonaz.pdfIn PDF document text
    • http://airmon.hu/images/files/15212931306.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/88059640091.pdfIn PDF document text
    • http://hijoin.hu/editor_up/zomarawigedemiwi.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/59118879993.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/18763442814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=commando+3+game+free+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_off0000b41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC32 10720 bytes
SHA-256: 0e0846dc231618359490db041a1b76b37d9bae7b0d7b4fe9f1249731126ced24
font_02_sfnt_off0000e4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A3 14976 bytes
SHA-256: d679fccc08529f27cd17e162aeda8baa8f432811f0c917b93b38b2407955caba

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