Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e2433d94d11640…

MALICIOUS

PDF

81.9 KB Created: 2021-09-06 06:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: aaf5ad5b31b3aa0812342b3f72849fe4 SHA-1: ba5bd9408072004ff350aa6d4a3a1178dcb9d4a9 SHA-256: e8e2433d94d116406a67ded4fb60706b7ae45a7840b1cc9ec98e60322d27188f
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 compromised websites and disposable hosting domains, likely for phishing or malware distribution. The presence of multiple PDF link farm heuristics indicates a deliberate attempt to obscure the true malicious destinations.

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 http://campfirewtx.org/userfiles/file/weletunelo.pdf In PDF document text
    • https://gobelsprofil.com/upload/files/bigisawozibawebufijunixin.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16107682fab9d8---27971165922.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918de7cdb56---sutarazulelerovil.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/ketowijewi.pdfIn PDF document text
    • http://ozona.pt/wysiwygfiles/file/xikenoximikepawokajov.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104fa8b9b9eb---17991543981.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/sipijaj.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/135a3a9f92cbd54a1e256d8c050bfb14/jekasevow.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/fesazawatewolelaze.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c10840af434---20113681215.pdfIn PDF document text
    • https://morabia.fi/images/file/18625255433.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/naxovulabogugenun.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/xipogifubebogetabevu.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/34338720739.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/pafiwolepemiwaxerano.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/1e7oh40dipd6i1mmg429hp9nq3/69711003055.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3cb47f79a---nebomuzijonepomalamowal.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1724df7af6af1265b816923312001b27/3909813426.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/94217256469.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/vasipajaro.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160abd7f0b7f55---80457293170.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121046d1abbd---lajubinudibatilutonakebu.pdfIn PDF document text
    • https://chingchia.com/uploads/files/202108282001068196.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/16635543842.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=kmart+aroma+diffuser+manualPDF 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_off0000dc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42A 10608 bytes
SHA-256: 82e9f34359809abf116c2de8a99bc514f469d2a2cb91c482e2bc7d6334745ed4
font_02_sfnt_off00010c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5D 17592 bytes
SHA-256: 0c337089ad7d6844d63730644ad90d4a33d5ff8fd1847919c78112964d96def4

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