Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb37bebb2ff8a8b…

MALICIOUS

PDF

82.1 KB Created: 2021-09-22 11:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0cf120045d280278996c1c928748dd60 SHA-1: 3ac6a7a54386863b7c0074a04cc2e0846cfee52f SHA-256: 9eb37bebb2ff8a8babc37e656d007ac4aab6af097115f4b8ca19a814aaadec90
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URI findings and link farm heuristics confirms the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://drafthe.ru/uplcv?utm_term=wazir+full+movie+123movies PDF link annotation
    • http://wwpokebar.com/uploads/files/pofolu.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/51350732193.pdfIn PDF document text
    • http://wuyioutdoor.com/userfiles/file/375447652.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/mogumowipokimasubiluwop.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/9777032323.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16134a70b9c99c---bopewivuvamogedowapuz.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/81922397204.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149723a92877---94525689365.pdfIn PDF document text
    • http://packturf.fr/files/53498134960.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/somebodasumufaxeda.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/podavurixilojuxerupu.pdfIn PDF document text
    • http://yidaig.com/uploadfile/file/20210917193247.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/zagofidaku.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/bujuk.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/63343707867.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/3839983602.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/b065836764ffccf632069aa74df407b8/84357478321.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1613c74a18cab8---busasodulumiluwo.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/27234600023.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613061b88c851---siweputukuduwofujetizezek.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/ragexi.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_off0000db21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB21 10736 bytes
SHA-256: aa3e471e9d9fb5c2bc4ab7a3d50fb2a1593d331a2ee59587a8e94be4a9248297
font_01_sfnt_off0000f402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF402 18448 bytes
SHA-256: ea9e012df28a4646646b3093099eeba59869d55a37410edafd667bf909e03d55
font_02_sfnt_off00012414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12414 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1