Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1884039886ee121…

MALICIOUS

PDF

85.3 KB Created: 2021-07-22 01:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5615f202391cb29c6245a1c9e4efe589 SHA-1: 3c40fcbac830b2fa6a7c639ad1e03032dd48ca85 SHA-256: b1884039886ee12181d3750dd13772019bc34f00bd53ba6674660796ca4ec94e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • 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 http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/21055484123.pdf In PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/qihqds5hkeifofuerunhe7r5t2/32247370752.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079635550ff0---43556733578.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8dc7dbc28---jipenusafar.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/18062116333.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/806s8jes7h77u017mst4lsr4ul/99317507751.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16211005561521.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/082em0d21bu7mlor60gkv5slob/tunujemapaxumipajunun.pdfIn PDF document text
    • https://eternalbliss.net/file/dewonogotaxelumad.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/mawivobulokafepelupebo.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/vadizarape.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fd2d080bd---tuten.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3d339fb44---fesamis.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b85b28b5e4d---jakoxovotaketesadopen.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/691660416.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c18584891e---54830703396.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/pqsltj0m63h83g267gd8ftldt4/ramidezuzibiluwulikugufa.pdfIn PDF document text
    • https://hissekurban.com/resimler/files/vitabi.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ra1jiagb5bdtcbn0mi9q3g0s15/78626848439.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/75568469586.pdfIn PDF document text
    • http://hnspkjx.com/d/files/jebifovejomeviwilu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=icy+tower+download+iosPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B9 23732 bytes
SHA-256: 2b4ba9de4823b46960c40a2a3e32ec6e9ed1f11bded89f75f56a24820c9dbdaf
font_02_sfnt_off000130d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D0 10516 bytes
SHA-256: 3df83ba63ebc188fb88ae40991db819f4cefae7d86fc528b4abe179de132f98e

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