Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00b199e46577f69…

MALICIOUS

PDF

85.2 KB Created: 2021-08-04 14:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5d3d89aaf699c8ff2d71f6729ee0dde1 SHA-1: 3c4750a22916d38a5b743f0cbe1818b0ab691075 SHA-256: d00b199e46577f6943410b9de7d0b51a2177a84707663b850aadaaa0c2af8536
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external URIs, many pointing to compromised or disposable hosting, suggesting an attempt to lure users to malicious sites. The presence of 'utm_term' parameters in some URLs further supports a phishing or spamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ketchas.ru/uplcv?utm_term=ftalato+acido+de+potasio+mas+naoh PDF link annotation
    • http://debnine.net/UserFiles/File/xanigixafasiwokane.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/55617532193.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/retutadowagilejipa.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/kalesinimijemujifa.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/82663490882.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2d4f3cb32---78410311137.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/95487107841.pdfIn PDF document text
    • https://collegemahan.ir/basefile/collegemahanir/files/85550404562.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea59bc4769---64996869331.pdfIn PDF document text
    • http://kunbot.com/upload/files/xudadixemeloxetarabono.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf5be62f3---famigixol.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/67569633561.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/53084795206.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a092510956b---bamepowuwojudebimojezavir.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/79930391588.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/246caf873bfcb7e3440bfd45b2c296f1/nobimu.pdfIn PDF document text
    • http://deborahbrown.us/clients/860103/File/basatutive.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16099ff6db4063---bavafizikimobatasevo.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/12266644130.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84bb459f05---bubirenitikovofuxexibile.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1731d5bfb9---196026798.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/79935ca3b6686e73ecefe6c2820a3f72/21103690667.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/5220d830adf0808f5852788ac35e9e25/47398407379.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_off0000e3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D6 19352 bytes
SHA-256: 4c4e865c8e2e9451ff5299b9f1d0af10ec63eec650d58cd102e40c14171f4780
font_01_sfnt_off00011546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11546 10656 bytes
SHA-256: 571f53c8d74e69412a94197ed541f1a1b9bff6d0a2d33ffadaa4dd390885e927
font_02_sfnt_off00012d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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