Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bad35d16fc8485f…

MALICIOUS

PDF

81.7 KB Created: 2021-09-22 22:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: abbcac53a465e9b53837437cd6060da7 SHA-1: f8b956334a19c6640a4fcab71ea8eff38239f926 SHA-256: 8bad35d16fc8485f42f2cfb797cc57d758f1c607c1b0d2b2a844c013d58a13f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs indicates a broad distribution effort, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • 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.
  • 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://salonorganica.ru/upload/files/milemigexogezilelav.pdf In PDF document text
    • http://jacsonsfurniture.com/userfiles/file/rujuzuderojigalib.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16143e8bb411cc---22880226193.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3c7e6ea14---97696391448.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109221838364299.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/42107454754.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161307e607c6d5---jesarivasuli.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/53998733660.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/71240139775.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/60850540942.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/5683588496.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/wogipakomefemepipinipuwip.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/81923808969.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/ec6696d1f939f92f2e40ec8f14f38482/28464918512.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/21908677208.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/pularizebux.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/daziminag.pdfIn PDF document text
    • http://www.startbatteries.gr/ckeditor/ckfinder/userfiles/files/vojupumazotojevejanosole.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/guzavek.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/70635139719.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16148dcf1da010---5069744310.pdfIn PDF document text
    • https://triyoga-tv.ru/userfiles/file/23959783810.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/badizova.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/jojomulagodi.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/63718060246.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/13624517355.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=wps+wpa+connect+dumpper+apkPDF 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_off0000dbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE3 10808 bytes
SHA-256: d3d367c514e60ced1af2c9c6f1983dde827eef9f60ceb6d0baff8257c87c3ef6
font_01_sfnt_off0000f4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF8 16820 bytes
SHA-256: 3a00f01b026a1788f3ff33fbac721d5bfae8f57559bf38573efdea0a1697ddea

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