Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d56ad173e3bc22…

MALICIOUS

PDF

68.8 KB Created: 2021-09-16 05:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6f0106a62b125abffb54dfc6aa8e9c97 SHA-1: 11291264aa86d6c3ad93caf7ba9dc2c304e98829 SHA-256: 65d56ad173e3bc22c86f23024aa6e29432dd4d22a20bdc86934e1f9922211463
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for further exploitation.

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 https://catamma.ru/uplcv?utm_term=idragon+movie+app+free+download PDF link annotation
    • http://isagenixmakessense.com/ckfinder/userfiles/files/digunemavoxe.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/10018853361.pdfIn PDF document text
    • http://floramarble.com/uploads/82272061830.pdfIn PDF document text
    • http://gewidor-gmbh.de/uploads/files/wogananin.pdfIn PDF document text
    • http://bwc.lt/i/66918189986.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/40626680973.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/99052133473.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/posozitufekadufogunub.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/tojipajivumuw.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/77438675319.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161427c3174490---24730708580.pdfIn PDF document text
    • https://viboot.traigiongthuha.com/ckfinder/userfiles/files/66044721354.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/bomujelorapidelexe.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/3292722758.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-10/20210910225127714863.pdfIn PDF document text
    • http://tranhdaquydep.vn/upload/files/83931096201.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210910041734.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/gevikoponajiwasozizow.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/72616433477.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/82110040988.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/ruriweseladakekuzojonodev.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/85714548107.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/36816227307.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/gapot.pdfIn PDF document text
    • https://qwert5.com/psum/admin/userfiles/file/65167850446.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_off0000b198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB198 14268 bytes
SHA-256: 3c14f2906960552195bfe4692238d3ded7e09f7df2231ff6f8cb54eaad18e2bf
font_01_sfnt_off0000d54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED66 10676 bytes
SHA-256: a943d928f4e5861e52604ad50b939c8ae19178bca4ef143344a0531ed5f988c7

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