Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee979d386a030f0f…

MALICIOUS

PDF

72.3 KB Created: 2021-09-26 17:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5210fdfb26ef3d6484c445cb0c2e2885 SHA-1: 6583bfae4f8b94ddfd4dbdf6a134ab6633df1f22 SHA-256: ee979d386a030f0f14db7df79e333556bf5d2a9ddfb1e1a8a83381e91a17603e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to disposable domains, strongly suggests a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://teplolux72.ru/upload/file/didowulawuf.pdf In PDF document text
    • https://skl.deindrukdemo.nl/upload/files/rikosozenameselufeza.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/77480446279.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/84374541198.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/lozunapidokuk.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/libesotalozogi.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/gepopazevilibiju.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/25046150579.pdfIn PDF document text
    • https://jin-ji.com/upload/files/93000610032.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/17826154634.pdfIn PDF document text
    • http://skkl.cn/filespath/files/20210912041108.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/bexapuzonixe.pdfIn PDF document text
    • http://cnfgl.netsociality.com/upload/files/gokativedomabiduvola.pdfIn PDF document text
    • https://kolorubursztynu.kolorubursztynu.pl/web/uploads/files/90153949539.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/37481183594.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/data/editor/file/81964839708.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/komuxasaxitiforaka.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b93f7834d---devirusesesinus.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/konavepijonugukoxomuti.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/13908262028.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16149837cbef67---jalavon.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/76498334707.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/99993983605.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/20409038470.pdfIn PDF document text
    • http://hotstamping.pl/files/file/sobatenisotigor.pdfIn PDF document text
    • http://vietlinktour.com/userfiles/file/kuziwijesigurimisumawibuj.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/31821136626.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=naruto+shippuden+323PDF 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_off0000b6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A6 16544 bytes
SHA-256: 580ef9f998ba38058033c0d8c14ff046c1d1482fea19e5649e61cd3ff4452936
font_01_sfnt_off0000e0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BE 10812 bytes
SHA-256: bf16193bfdb944232cd5347faa8dee71fa3599419fe5148e235d323cdb297155