Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6d1f1118522534…

MALICIOUS

PDF

70.0 KB Created: 2021-09-19 05:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c626d121460dbad48e4fc4d54ffe8f4 SHA-1: a6fb6500d469f47e8ab5632e2a1b9789301a565a SHA-256: ea6d1f11185225344024641ed1c161066b19442e08ecdb2540c138a548c08504
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and numerous external URIs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content or download further payloads. The document's structure, appearing as an image-only lure with a clickable action, further supports its use in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=descargar+photo+blender+para+android
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/78564522640.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614138d2203b9---bomomikizug.pdf
    • http://africalegal.nl/userfiles/file/66044815522.pdf
    • https://alwillislifecenter.org/ckfinder/userfiles/files/39911241063.pdf
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/gowideduraxeluvusodavebi.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145f913b6cd9---ravowotupisojepadapi.pdf
    • http://valencia.thepokeluau.com/uploads/files/goxiruzuk.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/takikazifavo.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614252ce70862---12156553599.pdf
    • http://springgalleryng.com/Images_upload/files/sixiluraxonubipozob.pdf
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/36072484042.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614017769ad2f---dixabebonufu.pdf
    • https://www.almuhja.com/ckfinder/userfiles/files/rumawudejovu.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16136e83e17360---nipobawepunenavomasuvosuk.pdf
    • https://greenvalleykerala.com/ckfinder/userfiles/files/vosudupuwexixawanobu.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141eb1f260c1---vobaxefuxoguweresoladizol.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/e6ba4bcef111889b77ddfa3f0dcf311d/zilurev.pdf
    • https://bruceleevideos.org/images/file/xomamedojutitedixo.pdf
    • https://kristaldicarlo.com/userfiles/file/34421140425.pdf
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/17383900682.pdf
    • http://nabisori.com/userfiles/file/9067960362.pdf
    • https://takarasushimn.com/userfiles/files/65467820775.pdf
    • https://alicantea.centralcms.cloud/galeria/files/xufezopa.pdf
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/95222774522.pdf
    • http://softtox.com/new/userfiles/file/81335810662.pdf
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/23150345810.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6e7.bin
e65be9775b79753e104f2b37909476a422cd4d064a3d121edb98ec2e2a1e6fbd
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E7 10936 bytes
font_01_sfnt_off0000cfc2.bin
ca2fd4b1d0fe07efa79919f62c67b03da3b6e7b33e25335408f71f273782ad88
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC2 13800 bytes
font_02_sfnt_off0000f1d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D3 16792 bytes