Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5ced478deb6a7c…

MALICIOUS

PDF

72.0 KB Created: 2021-09-22 19:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 55f25c6bbd34fca5223db9acd9788915 SHA-1: 9a08e5f91015824b6f286bce666642b996e946bb SHA-256: cc5ced478deb6a7c7a440387ad08f9d20be2149bd106b5a54a944cbb423fc7f5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs pointing to a link farm, suggesting a phishing or malware distribution attempt. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically indicates the PDF's purpose is to host a collection of links on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161324caae6cf0---65786357003.pdf In PDF document text
    • http://tubelessons.net/cms_images/file/wipem.pdfIn PDF document text
    • http://www.autoservis-hubatka.cz/admin/upload/ww/file/bimikivuk.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/megapofoxisodemuledosite.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/pawodakonevun.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/92895351595.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/mudotunowel.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210903082138699470jrbbowtybflw.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/83550961454.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/zowesamerijifosutupa.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/22521808009.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/d71ed3be53e35f758cbde9b9d897b04a/vodoxosizipapej.pdfIn PDF document text
    • http://tfforming.ru/d/files/zijoviro.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/75089138737.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/96746490836.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/fimapesakaze.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/luzasupodesosi.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/jinatoxogijevirexowug.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/66554819464.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/44646311261.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/23804399180.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/nafotesopiruro.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/72282402681.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/92222595609.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/jamufawapikusek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=max+payne+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_off0000b792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB792 10348 bytes
SHA-256: a8169fda35dee948ab6f34cee72089c25f45ec00fa3e0b9e8eea0d944207a704
font_01_sfnt_off0000cee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE9 16684 bytes
SHA-256: f66e5d7277cef44dc8f6738a7193acf8be9ae0e68dd5887ad6f334bc41d4c24a
font_02_sfnt_off0000fa22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1