Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2cd1e5b8c8b404…

MALICIOUS

PDF

82.3 KB Created: 2021-08-21 05:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d706d11180bbc9891d64e7d28c71bd12 SHA-1: c3f60497efb3c8069ab5ccd0244a56fe185dc283 SHA-256: 9e2cd1e5b8c8b4044eaed71225553ef33dd645e265fd69f6e6ef5694bb2c1a29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external resources, many of which point to compromised CMS uploads and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. No scripts were extracted, but the structure and URL patterns suggest a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/c1f36ba2361461dbef59fdef9285530e/xokowaxadakunid.pdf In PDF document text
    • http://fluitec.fr/ressource/site-image/files/wawadawakojaluf.pdfIn PDF document text
    • http://midlandhigh79.com/clients/866549/File/42797618324.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b964c8918f---18343193828.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089be979ce97---fadexubiro.pdfIn PDF document text
    • http://hitoduma-d.com/files/files/fijexomelizabatalewuj.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/diferelurazabujimibe.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/mirusimasubatakulevuf.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/36pvv4fe4m1nmvrjhk5t26jrm0/jemamaxeziworelovuz.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/72421662788.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/49dda382bad7009a32973debf01d7c2d/12959097702.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/846e272b940ffb818ab2da5d6188af10/jokegizisi.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/nulebuxexa.pdfIn PDF document text
    • https://singlespeed-switzerland.ch/userfiles/files/demukenenogobobufufi.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/51119754135.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/wewofarimeneber.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/er9n7lgtjrq2nr1qqg161o4a06/zozuzugufukeju.pdfIn PDF document text
    • http://agro-partner.com/Image/files/6986765272.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/759675aa2eaf60181502bde63010b58a/lijigotudexe.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160823a9ea6fe2---nifax.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/48918053625.pdfIn PDF document text
    • http://vieclamquantri.net/upload/files/76814340741.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/61692540440.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ffc69849498---mowuzazovorafolarolodogaz.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2f6fd862c---11899415416.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/femapodusudimigupef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=farmville+2+apk+para+ve+anahtar+hilesi+indir+iosPDF 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_off0000da8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A1 10912 bytes
SHA-256: 45c6ac071b571d2d33f4d521bc28ae5c60e65b4fed1ee9bb2efe72a0259c0de4
font_02_sfnt_off00010bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB6 18256 bytes
SHA-256: b9531aeabd026257c7d043f18de4b2d2d3509a03356beff8322eb384af6c4670

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