Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedaa97702960c64…

MALICIOUS

PDF

82.0 KB Created: 2021-09-16 05:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d57889f4784f56ec7303e68de916a066 SHA-1: bf732795a0b6d3ad3e20340f7cadbcf7a367b220 SHA-256: eedaa97702960c64d6384c44bc97053b3ee46b32f094d55448e1dae5cfc8e421
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to compromised websites, including WordPress upload directories, suggesting an attempt to host and distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a download button heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inwebjor.ru/uplcv?utm_term=hill+climb+racing+unlimited+gems PDF link annotation
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/f2e5c322413a593d7b91e022823dd285/putexu.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/sorigegimuvon.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2cd5ae50b---desumafaxodebulej.pdfIn PDF document text
    • http://oecschool.com/userfiles/file/faxed.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/bonexoroxobegojutix.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/temikamo.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/nafoparobu.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/2f186bf70a8475dd379bfed8c6c2d81d/pixesejolaxawupixevup.pdfIn PDF document text
    • http://nhatnguyen.vn/media/ftp/file/tiwebesimuwototilegap.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/8702775922.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/vitoluget.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f74048ce5---nelosepumuwoxo.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xuginuju.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109111718412677.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/93569441879.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/materoxegefebuxo.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/wojarebosalunud.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/zazemujobiki.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/69308816486.pdfIn PDF document text
    • https://buyafranchise.org/files/files/53614268370.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/davad.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/nuxoxi.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/vajowitixapuregutat.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_off0000d8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F5 18516 bytes
SHA-256: 43e96c8d880aa65fece73511c122dd6223b6b39435792c9d61a28f93a5dbdb65
font_01_sfnt_off00010996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10996 10824 bytes
SHA-256: 08426b8f2e685e94d2ed43ba5e4296f8ce79759aaced805984110e275b4caea6
font_02_sfnt_off00012247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12247 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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