Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb3eec3d5876f34…

MALICIOUS

PDF

72.4 KB Created: 2021-07-23 15:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 2e9afed1ce0cd1836fc6c712b038b814 SHA-1: a05730d47117cedf002c696df2a518efca62f07e SHA-256: deb3eec3d5876f349367896161da5b16b9eff5d4511c97f472d1d056f82b4f32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to compromised websites and link farms, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the nature of the detected heuristics indicate a phishing or malware distribution attempt, likely using a spearphishing attachment vector.

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://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/4fbe2c2f2e023e4bea01b5beda178d9b/50486593429.pdf In PDF document text
    • https://bangvetthuong.com/luutru/files/25102914135.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/lajose.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/xebojen.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160add32d83226---sometefapana.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/gituve.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/fitibezinixo.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/f2nbnatpo5rm43tcfsci3ejacp/20261158653.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/06f6a6fdeec7649774b45227e2c88320/divipexobiluwuxo.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/susosafugofoximupavareke.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/fasomupunaxixopi.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/86fbf3461f3b3fad5eb86e10e806e2b2/41213237474.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/16787246631.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/81353658627.pdfIn PDF document text
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/69024929426.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/pabixa.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dd07beb5e---15715791138.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099bd3e13e20---69528195018.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/xemodokakumew.pdfIn PDF document text
    • http://land89.com/ckupload/files/pifilubomipovibat.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/67773630743.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16085d17ebbb8f---5400475151.pdfIn PDF document text
    • http://standdominica.org/files/files/kabegubazizes.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021062608541973499.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/d7ee24c10ddb6dadc096ebcc85d2fc8e/kigizozukiverujo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=logic+pro+x+download+mac+redditPDF 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_off0000bce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F3 15036 bytes
SHA-256: af0987a0bddfdd0448ab3f3d7d6e5369613e8211c58ef39ebbb901804fb58bd6
font_02_sfnt_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 10836 bytes
SHA-256: a23331f084dd2da1502021e7b6ddc663a8fdd52d92eeac91fd0e57ad2749af1e

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