Malicious PDF — malware analysis report

Static analysis result for SHA-256 978c54e3c907d51d…

MALICIOUS

PDF

83.9 KB Created: 2021-09-19 04:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2a6bb80309ec1acccae5c8d82b229c46 SHA-1: 7a9eb0469dba117d3ca8f4311b0df14d5841bbae SHA-256: 978c54e3c907d51d023671d4ef9a4bfecbbf06a244433b37f87ec1056a3d81fc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong likelihood of phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://archism.ru/uplcv?utm_term=how+to+restart+snapchat+on+android PDF link annotation
    • https://castilloexterior.org/ckfinder/userfiles/files/76604972950.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/ligunuzukuxelijezij.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/woripurorokifitimevexadu.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/zeviwagifabisukakopak.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///lijekuvuretevozi.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/64199363862.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210903001957_nmkk01.pdfIn PDF document text
    • https://upaspor.com/resimler/files/67366492600.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/552ab72dfa86bff67412c93ab1f9dba4/bipizanijipekovoxo.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/84255844865.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/34330329596.pdfIn PDF document text
    • http://peter-crooks.com/userfiles/file/22582856078.pdfIn PDF document text
    • http://scantech3d.com/files/fipedegavatejus.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/30645130790.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16145cd85b9be3---74748568283.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/6190965473.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/18014345937.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/jogegejomozikup.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/35139132448.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/80638770483.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/5609208806.pdfIn PDF document text
    • 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_off0000e2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D7 10644 bytes
SHA-256: a09b5b1f627311c21f8720648542ca7a3ec03600713216daddd02d8dfbf4cac4
font_01_sfnt_off0000fb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2D 18196 bytes
SHA-256: a59480e53b66b394330c59735b3adca5265a1448e91da6a0e4155a74432d8c04
font_02_sfnt_off000129d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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