Malicious PDF — malware analysis report

Static analysis result for SHA-256 560eceaeea255f42…

MALICIOUS

PDF

82.7 KB Created: 2021-08-15 19:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c53e4443566d40848540876fbb8ad992 SHA-1: ce0f67b2414f9d18c5386513d4b754796d9380e2 SHA-256: 560eceaeea255f4215474b168121b7a5102509634cdaad5781a11b7da87bbefb
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to host malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. The presence of numerous external links, many hosted on compromised CMS platforms, supports the classification as a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760ec54c3ec---53399868240.pdf In PDF document text
    • http://lamachine.nl/userfiles/file/nulidutipisubawiponifodev.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/98320048361.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e6fbb9d9f0---foguwiwowijipep.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bbff66b76e8---getawekalizer.pdfIn PDF document text
    • https://luminex.pl/upload/file/57521251775.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/eoa8hlfbvi5nrndjj2466fdkib/dasuvuxulusekujabat.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/kuvazaditaraw.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/81067058068.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/15217273000.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/a7ulkb2ssogm9i5o3kuldo4s64/78692421069.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/3977649377.pdfIn PDF document text
    • https://invest.pl/userfiles/file/godofiwevuget.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adaa672ee9f---1469195776.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/056809344ed54da425f7811f29e8a63d/duvideduxisimiz.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/fabepotikixasaxaz.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/89621069387.pdfIn PDF document text
    • http://yuha.be/_files/file/35529936949.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/34782465831.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44e66b2e91---vituwowewizaz.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e9155abae62---matevopim.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16094a174ec8f5---kufibavexasevaweriwi.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d52d44593---43831012606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+get+mental+toughnessPDF 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_off0000e117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE117 16964 bytes
SHA-256: f658fcd9924c64d13681bfcdc786d7ec3a15a36ed80906ad3dea023422fe58d7
font_01_sfnt_off00010c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C97 10540 bytes
SHA-256: 1c4a6f66e8222af3c1c7e6150e6700e60f824bbf9595fc2eb7b5b70c7e9abd5f
font_02_sfnt_off00012480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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