Malicious PDF — malware analysis report

Static analysis result for SHA-256 09326dec2c3eec78…

MALICIOUS

PDF

78.9 KB Created: 2021-09-03 20:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b79eff61a880f503a99b97fd9dca9492 SHA-1: 1e8d845b616d58aef526bc2d3fdddef44448362a SHA-256: 09326dec2c3eec78ca7a6e950aca3f88d64cf77eeb6f8452790cfc15f4d48adf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • 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.
  • 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://curry-box-deluxe.de/userfiles/file/fawuxuxutana.pdf In PDF document text
    • http://landia-print.com/pdir/file/mafirul.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/7055753551.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/lusabixufejiveregoxililes.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612af11a00439---dawazideliviranivajulu.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/zitevojo.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/58791332986.pdfIn PDF document text
    • https://energooptima.hu/upload/File/pojovez.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/32710352759.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/9d52daa3203ea7b363188c60fc4e78b4/69538102615.pdfIn PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/97555918976.pdfIn PDF document text
    • https://mavibusiness.it/file/nodojutabamomurekurar.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4583e9be21---51325444455.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/liregasidokikojuvodufoxax.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112e92619243---vadinonemosinelemikexe.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/fizomevapi.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/9ofh1ifkbm6a6u4klhedktosej/nuwoxajobozudaroxi.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/jafikejibirebunap.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/18328111092.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/tawasidovurofoxunu.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5fa7775962d793e20d3177df131e4a1f/54213619718.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/pakiri.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/29493273275.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=best+job+application+letter+format+pdfPDF 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_off0000d09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AF 17172 bytes
SHA-256: b0a0400b90eaf63a181cf731f0e9559b3c06714476edaf6dbafe247584c34610
font_02_sfnt_off00011493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11493 11104 bytes
SHA-256: c08f955330414a24c91349ab909211eae1f0a100b51a025088595ea73105c81e

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