Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be2e449e054f915…

MALICIOUS

PDF

101.9 KB Created: 2021-10-06 16:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4a37ff63a87793486d336c59fadb1e4a SHA-1: 165915ab2fe51d4574c38101b5dd775d0471fa3f SHA-256: 0be2e449e054f9158775d1ebc9ae50f6cdb194aca3cebb00892e42e656a72325
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://headlinesdinerla.com/uploads/files/11538095783.pdf In PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f90b3a590---7834813039.pdfIn PDF document text
    • https://sunsetlearningcenter.com/userfiles/file/zuniva.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/63955342297.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/pemunelos.pdfIn PDF document text
    • http://niboparis.com/upload/fckeditor/file/1633481364_1.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b040f8ab4d---jafesubikemojamuridoris.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/73748072628.pdfIn PDF document text
    • http://giaphatmed.com/upload/file/74542957997.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210924095120177.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/35027050055.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614531bdd2c8f---89279559971.pdfIn PDF document text
    • http://yeongwonenc.com/userfiles/file/36702363782.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/lurupuzolilagufuxud.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94413091083.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/regoxurujovubuvo.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/josififitosoxulezum.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/wulosanajuvubabe.pdfIn PDF document text
    • http://mps-india.com/userfiles/files/29995420682.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/59347047633.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/vobarajewabufakew.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/42757852514.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/pusonisodusidewusapis.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/reniwigatus.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/putowezudabiv.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/79790753206.pdfIn PDF document text
    • http://polipack.ru/content/file/megob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=power+in+skill+related+fitnessPDF 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_off000125af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AF 19668 bytes
SHA-256: 59043b16baa32a70255f3ef0d365a56c0cc18e696f90b1b32bdbeca89872ea11
font_01_sfnt_off0001597e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1597E 10528 bytes
SHA-256: f245f3019f516a264ff79fe3e5c7977ee6d1ffcf7613763cb0e42ba437adf529
font_02_sfnt_off000171aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1