Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76dea49acc9e8cc…

MALICIOUS

PDF

81.7 KB Created: 2021-09-14 09:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1c6d17018fe6cfd04c01ac4a89f2cd0e SHA-1: c435ae41bbf7d28e56bcfd1756907cff66c9f999 SHA-256: e76dea49acc9e8cca469fee3b135543b505792e4d4f3119a358d89d680c15135
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of external URIs and the overall structure suggest an attempt to deliver users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://imhyuk.com/imhyukeditor/userfile/file/gixivewujozigizi.pdf In PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613114a900eeb---28270098408.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/48093247346.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/41982572093.pdfIn PDF document text
    • http://shopabrang.com/images/files/97508035430.pdfIn PDF document text
    • http://dmkert.hu/files/file/pupazifelewelelix.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/mesem.pdfIn PDF document text
    • http://akcompany.vn/uploads/userfiles/file/67949599579.pdfIn PDF document text
    • http://devison-matras.ru/upload/file/kanebozerobafaji.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332ce144c1a---jipatorojebinowepofozo.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/gunesivuxojojawumigu.pdfIn PDF document text
    • https://avenue102.com/uploads/file/99446792320.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/17cf3f55e272789e2f44cb2a0a9878cc/47158090089.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/42425790061.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/piralixomakot.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/12328867445.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/voxine.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/dawogariniwir.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/30142886342.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/55920141946.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/runusofuvubisoju.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/b446ce498aacad61c61bce7fd82bdb65/gisexegejigak.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/gafunurezesoxivixavafoma.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/9d9q0jnhm0ih5jdq4d7mb5q3tj/70057435094.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/18512625489.pdfIn PDF document text
    • http://lex.tj/img/file/laleromajusuwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=manual+gear+car+parking+mod+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_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 10776 bytes
SHA-256: 866aac35d8d59df6e30a42120d2fbe648098168e1e69cdc265118b76fc1c8c8c
font_01_sfnt_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 17768 bytes
SHA-256: b714ce4c36df034fbe1f3991bf7e88625c788ac203c8bfa14ebe74f54e25187d
font_02_sfnt_off00012058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12058 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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