Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eeb32cb765ebaa7…

MALICIOUS

PDF

85.3 KB Created: 2021-08-18 01:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1761c7b828f1c8bdc961c323334680f1 SHA-1: 5375d50c41e517c991cb9c81c3f9406fc486311e SHA-256: 4eeb32cb765ebaa7f907acde8e24bcde7f8a90fab2ccf3283fd6d1a370e53a5b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://eletmodguru.hu/files/files/56195344069.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74c63919cf---texafiponovarexerebaduz.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5180923850---bupetefapavaweg.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/95451874172.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/o5r6iegu5hal4e4l3si67gbhft/fexokize.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/44621828363.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/gobil.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/wajagakegiduxa.pdfIn PDF document text
    • https://kuepancong.com/contents//files/joraketawukakixevilutev.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/tepumazijuzajarezanewug.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608798c26012f---zerepofokorikala.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/e9d8ad850b1bec92c2f7871b727d60f5/duxomoniwogeruzeki.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/42711164153.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210817_FC6C9E786F026007.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/79158090537.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074d57a8abb6---fejibugutibef.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/munag.pdfIn PDF document text
    • http://saraiaser.nl/userfiles/file/sobotolasodurenimetajigu.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/62792578715.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/ad07ed8abe42eba5c8f336c5892efda4/27070603918.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/4a5af09fc9fc162584ed6c1ed6cd5df5/gepidavuvituvilosero.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608120c52a003---xikita.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/wukusodijakaberemosufoda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=gamyun+uygulamas%C4%B1n%C4%B1+indirPDF 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_off0000e2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2ED 10540 bytes
SHA-256: de1aaa43b1c0f88f157157fc0184e20f2c93a5dd4518daad5c986718aafc51f6
font_01_sfnt_off0000fa90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA90 20192 bytes
SHA-256: 6956512d7dcc0e2cc43f7d898fb7e32513688256a5677e497fba2a792fdc5d3d
font_02_sfnt_off00012cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1