Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0c8ff37cf888cf…

MALICIOUS

PDF

51.2 KB Created: 2021-10-03 21:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 4dce395b7bbc87d9fa71dc5ab23e51ff SHA-1: 6ea813d803584d59e2b55ce3530c5f2680ad92d5 SHA-256: 2c0c8ff37cf888cffd70621d689cadc83f31b3c52f55af56b019e1a794ee334f
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded clickable link. The heuristic 'PDF_IMAGE_LURE' indicates a typical phishing shape where a screenshot hides a clickable button. The numerous embedded URLs, many pointing to disposable domains, further support this assessment. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest an intent to redirect users to malicious sites for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8764

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 51 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://sipsak.nl/userfiles/file/90165983981.pdf In PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/zekozinafof.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/27904766953.pdfIn PDF document text
    • http://linza-market.ru/upload/files/20941568255.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/45964737063.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/vamidevidized.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/belanikas.pdfIn PDF document text
    • https://cmoretv.com/userfiles/fufedagomox.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/95948382940.pdfIn PDF document text
    • https://unstitchedutilities.com/files/file/fevurasim.pdfIn PDF document text
    • https://csam-villepinte.org/uploads/images/file/67323141263.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/77704756392.pdfIn PDF document text
    • http://dastone.ru/userfiles/file/virelizuvifobata.pdfIn PDF document text
    • https://rosycaffe.com/file/48689884247.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/18434308169.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/tozaliwimo.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/jusugukujokamiwexolaxu.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/xosugawodisejagul.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/lagunipijuniseserogitin.pdfIn PDF document text
    • http://220-wm01.netdbhosting.com/file/31370280877.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/5117820849.pdfIn PDF document text
    • http://katela.net/userData/board/file/69335085881.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147915ba6127---1504324717.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=northern+health+and+social+care+trustPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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