Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff4a36a22a8a60a…

MALICIOUS

PDF

342.2 KB Created: 2021-07-06 20:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: bbf5b3d30306b5a4b0db14b041350925 SHA-1: d3adb954017e30b8797b71b137f489ba7b0a7618 SHA-256: 8ff4a36a22a8a60ad686ded1ff2af3671c72e60981daf3b2c110934d08ef65f1
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple links pointing to compromised WordPress upload directories and SEO redirectors, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' indicates the document uses an image lure to redirect users to potentially harmful sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9607

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://pistant.ru/uplcv?utm_term=play+cards+against+humanity+online+multiplayer PDF link annotation
    • https://cortopolis.ar/userfiles/file/56594712087.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/kozofusudajeji.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/13575245190.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/m6badc9vejf6p071jpghdk280o/maxunomuse.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/19f06a68a0bcfa0d77b0b8d09dc89158/60648536000.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608625be30631---11396252851.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aef085e16c5---37571115668.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d03c6901---85684114924.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/mimenutenivi.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/bugopevitoz.pdfIn PDF document text
    • http://12shio5.com/contents//files/kamubezido.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070012094e6b---mukurikikosufalewanode.pdfIn PDF document text
    • http://bakoca.hu/files/file/50339150498.pdfIn PDF document text
    • http://citra.cl/userfiles/file/14021854682.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608deacfba758---75735500876.pdfIn PDF document text
    • http://alamansyria.com/userfiles/file/sedejipibirimura.pdfIn PDF document text
    • http://hi-techfiber.com/userfiles/file/4186258134.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/c59a50020c5833f101ac27d8b5ffec1a/8749954197.pdfIn PDF document text
    • http://cartopack.com/Images/file/34296120020.pdfIn PDF document text
    • https://shidoremicrosys.com/media/83708786664.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea1324ff7e---47323059751.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/483bfe4d929f0b5831106806ae3e6de2/39179047141.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/40475641982.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004cf9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF9B 11176 bytes
SHA-256: dda6823fc27c8dab09fb83d81c0ba9c2990cdb5b35c423e88584a43923b32c27
font_01_sfnt_off0004e961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E961 19776 bytes
SHA-256: a9dceed3e4b4b5e31ac60d63358bd3572b3e9fa5addf2ab947df55aa4ec6cf7b
font_02_sfnt_off00051c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51C23 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_03_sfnt_off0005319f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5319F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.