Malicious PDF — malware analysis report

Static analysis result for SHA-256 36122acdf7604956…

MALICIOUS

PDF

76.6 KB Created: 2021-09-07 23:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 512557440d772454f3b2681b99f500b4 SHA-1: a2a029606eb07fb508c6df2714c8b4e6d6d6bc82 SHA-256: 36122acdf7604956c4059a774035e104f6c2ba6c2ddec0c6037b0b62d69c0d54
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains embedded JavaScript and a large number of external URLs, many of which point to compromised WordPress sites. These elements suggest the PDF is designed to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 https://huntic.ru/uplcv?utm_term=phytophthora+palmivora+en+cacao+pdf PDF link annotation
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ee50a991977---zumobojozujefesetexeral.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/79784241741.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/bedabc5048ab41319d37b400e354bdf3/38709347112.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e355d85e34---33938920627.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/23623930141.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/0mouj1dtn0207m6pkv01p87lc6/pawixatezuxevut.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/45482045886.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f83b816cc2---13277097133.pdfIn PDF document text
    • http://hodgesmageefamilyreunion.com/clients/c/c9/c95619ca3ec29dd030dc8935b97378d4/File/levalikipupikaxebexeza.pdfIn PDF document text
    • http://la-klamm.org/userfiles/file/27330064224.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/lewuwonaxotawebev.pdfIn PDF document text
    • https://steammining.com/userfiles/file/83326271403.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088267f0c29f---balopalapevowopubovit.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae76026bfee---4284024088.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/40588816042.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/45504500529.pdfIn PDF document text
    • http://maxkbm.com/clients/2/28/28fcaa936e2ecbeb6c9a97ea0f1ab253/File/18425986204.pdfIn PDF document text
    • https://successalpha.team/upload/files/35910009779.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/69769631748.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/27686287167.pdfIn PDF document text
    • https://4of100churchstreet.com/assets/media/files/zokori.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/kimetit.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/98354617929.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/64397737548.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/47684631732.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_off0000c6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E7 17376 bytes
SHA-256: cec34adf2ff984a5ec2782d6fe80c9b39778cc3da674334e815b18bd48fd73e1
font_01_sfnt_off0000f3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFA 10896 bytes
SHA-256: 241c98c382bae4ac7eb876df31b1902ff8cbeeedccf54d5537d94c51cbf5bd26