Malicious PDF — malware analysis report

Static analysis result for SHA-256 185c0bdd5e7de886…

MALICIOUS

PDF

66.8 KB Created: 2021-09-27 12:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 6a4b7befe1f0a6cc1e4ae594e2540d3b SHA-1: 3b3674f837f1c1b80cca2d2ced53f218a99b76e7 SHA-256: 185c0bdd5e7de886d0a0744b214a60692f2de67029e321b3f604ad3451396bd5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, possibly for phishing or distributing further malware. While no scripts were explicitly extracted, the nature of the embedded URLs suggests an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4735

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://pantryscan.com/123cars/imagefck/file/kezogasipuvo.pdf In PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/lojadupawixijuxojojid.pdfIn PDF document text
    • https://majubesar.net/contents/files/13477421674.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/jovub.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/90280529622.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/98745203109.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/82872236581.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/sitajurefumusirote.pdfIn PDF document text
    • https://akconta.com/uploads/files/woxadotubalot.pdfIn PDF document text
    • http://volker-issmer.de/userfiles/file/30496978613.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/kezezapagani.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/suruxebovisulazovasatos.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/95794009521.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/gogutaxogenekos.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/16422704759.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/fijiwerabiku.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6120b5810---96097488316.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/xewaviro.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/jafopusozuken.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/54679072597.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210914105527561.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f99f9a591c---22499759143.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/rofolemajofigumojovo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=crazy+rich+asians+book+downloadPDF link annotation
    • 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_off0000aea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA6 16504 bytes
SHA-256: 7754f28b3c60ae078a07c55185f679ee512dbcd1e983f7530c58d2c46b5163ff
font_01_sfnt_off0000d8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CD 10760 bytes
SHA-256: 8ddb927ff9cc07bd05212239918dcacc0bc81b128195a5f25f5ef7c9d3a082fe

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