Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa59e642a7fbae2…

MALICIOUS

PDF

95.1 KB Created: 2021-09-01 06:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7b2a3c552adc497da88e0397e4babf1f SHA-1: c1af7a34ff1cfb93780a4dc44a2b721047436563 SHA-256: daa59e642a7fbae21d620533ec78930c12421be20687aa83d2c106df660b22e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=wales+quiz+questions+and+answers PDF link annotation
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/774c5ccc45080d7714b10eb5ced55310/fevatevugedukubuvame.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610450da9eb9e---mikalotalomi.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607308055d4ce---99150380409.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/safaxipitu.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/8cbc4147a6aa696409e1a4c5d45066a9/mibewisogetuzala.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/0482ec2c72dcb54fe8f6ffd7dae58b2f/4982121443.pdfIn PDF document text
    • http://thaide.org/userfiles/file/40300132372.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/xanotu.pdfIn PDF document text
    • http://azizolace.cz/images/file/30758747981.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/fozuwarerun.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/bawepepazisanugope.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/9d27e82d2818d426829112f23fc40e5f/riwodezurik.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806b2958afa---56768982261.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/7e584dc5a0359abd6184174abaef6a11/32152250448.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1629309130.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/35931321144.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a3baabdcd---76827011885.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609baba242106---51493243103.pdfIn PDF document text
    • http://mhs69indians.com/clients/864804/File/giluwulijevav.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/filaridotifagubediputam.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/24039284147.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/25261930021.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/firenewozowut.pdfIn PDF document text
    • http://bbu.vn/Images_upload/files/gigowexetabit.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_off00010c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001241f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241F 19012 bytes
SHA-256: 34bff06060173384ec06c37526f79d7ebdff139be4dce2dcd95dcb1543ab8217
font_02_sfnt_off000154fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154FE 10624 bytes
SHA-256: c4b210fb0c4ef07759cccb58e32274d0902d838930f5d1d667c43ab218c686bb

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