Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde0ea61f68921d7…

MALICIOUS

PDF

79.6 KB Created: 2021-08-31 16:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 68aff2952d68349e27f0b01d5f85e9e5 SHA-1: 72eb0325d89d6e2e8e88e5c284dbcd94cac3d26f SHA-256: bde0ea61f68921d723668de3b3e7947b6df866a2187a8cde55cbd7012eb734ca
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content on external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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=how+to+draw+buildings+easy PDF link annotation
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/735a72de010c9bb0f29504e625825c9d/xobexelerafobusesomenezaf.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/45428408169.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/74352149294.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/lotul.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/jovafenekevav.pdfIn PDF document text
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/24611187300.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/3278315726.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/53282726180.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/74bc9090981d2501425e874ce3e8d557/14830281914.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/eeba2ae317e1ce52e7a00620ade6067c/xogodafavofopuwufa.pdfIn PDF document text
    • http://lws-realestate.com/userfiles/files/vegezaratiwotasedesij.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/rezuzasonamasatumumewu.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/2021827723534443.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a8932eb3e---80584964568.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f913abd3a6---gufuxobatu.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0fb504111---14646527469.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b27a08f0a05---kitusewunokarurajap.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/xogozazagukezinoxibuluvo.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210625025900.pdfIn PDF document text
    • https://promise-land.com/upload/file/75303626951.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/d1cf99789236ee32b05b87be37268571/11593242863.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/65010880862.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/pemedorapawatebujan.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_off0000d608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD608 10856 bytes
SHA-256: aa46144588f00fcd22026bd464fe6509195431ca1de1d5784c59feb781261f67
font_01_sfnt_off0000eefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFC 16412 bytes
SHA-256: 95251bd8981d1e42677cab52515da30daddce134f7fd32110da3e8678cc96f64
font_02_sfnt_off000118ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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