Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69a2986c46d76c3…

MALICIOUS

PDF

109.2 KB Created: 2021-09-02 14:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 60587ab45d603df06f3d9975d901e83e SHA-1: 2c17854a49d86c91ff20a5fe8cbf7f206f12b307 SHA-256: e69a2986c46d76c385945c5ea50dc84e93e0b790f9610ed0f05f4e4d093ccace
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to external sites, some of which are hosted on compromised WordPress installations or appear to be on disposable domains. The ML classifier also assigned a high probability of maliciousness. The primary attack pattern observed is the use of a link farm to direct users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9677

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://hadt.vn/upload/files/milevitamu.pdf In PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a556cae42---zawujebefiwube.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/61286414355.pdfIn PDF document text
    • http://gdaniec.com/upload/files/zewupetaturulexojosik.pdfIn PDF document text
    • http://pvhs1967.com/clients/a/aa/aa78cb05297cd93d8a9ab6bd1eb8a3c4/File/59889808291.pdfIn PDF document text
    • https://nasroglobal.com/userfiles/file/46377477935.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/82491480632.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/81mcf14n623nqs2k2v6ta8usc6/43549327627.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c009fd2b448---mefelejezavabomudijul.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/pobipu.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/11435971450.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808372c45d2---vipeweteb.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/71821371740.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/44500568107.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/zovoruzupetatoduf.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c5d017bcc---73568973178.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/r2lgdl9ifhr8ib3d1ng4a4qu49/89313034217.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/fifosuredagir.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/mopilevujomememuti.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21f3f4bd4c---mukugajegixevalofakuseli.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/56859355586.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/xesasogofapisaburupimo.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/37f59kbe3lni12ek18bvngmvt6/kelinanizuzeru.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/33f4bffe58b50a90e625c298f63ee62d/peguv.pdfIn PDF document text
    • https://giyimkent.formenemlak.com/upload/ckfinder/files/nitaxosavodebeverigupezad.pdfIn PDF document text
    • https://novamakine.com/upload/ckfinder/files/xazodomavazujuvagonilu.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7c7bbbd11---kibaripukiputegowet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=a%C3%A7%C4%B1sal+momentum+sorular%C4%B1+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001248d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9E 16168 bytes
SHA-256: 1cfb00680a8a18ef5d5af493cc5b57cfe410abeba37087ee2ecd799c98b61e68
font_02_sfnt_off00015236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15236 21980 bytes
SHA-256: 484ad969576db815af3dff868b426f4278b4f58767df3baf307715523cc1330a
font_03_sfnt_off00018ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AE9 10892 bytes
SHA-256: 0ad5e7020ba1d4d00edb66152d839c9cde605528af11b77aa5ac99dec412af87

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