Malicious PDF — malware analysis report

Static analysis result for SHA-256 329ab72af9e32676…

MALICIOUS

PDF

72.2 KB Created: 2021-09-22 10:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 80e0d554fec29cbe3d4193dd3bff6b1e SHA-1: 679c75fb45b208464493c41fda0c1051f69c87cb SHA-256: 329ab72af9e3267635d203ff9e8c06462e0df474368ece85eed0c8f91faba9b1
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV and an ML classifier as malicious. It contains numerous links to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with a 'utm_term' parameter indicates a potential phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=download+anime+episodes+android PDF link annotation
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133e6c7336f5---70149336028.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/30566969155.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/38211368298.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/gisozopipenorivukijox.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/zirover.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/77504449127.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/87919815788.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/29108270787.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/59103139868.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/42550679009.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/banonosujalukabemivudevem.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c96af7801042b15b4e763b8b80306893/vajunedepifa.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/nikoz.pdfIn PDF document text
    • http://automag.pl/userfiles/file/pewaretowagixipaxa.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16144835464283---59675748596.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/fatojonodapomov.pdfIn PDF document text
    • http://sdds.be/userfiles/file/wubusedudakij.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/ravogamozo.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/71601989563.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/5e08c984aa6f8021655f173aaa5a6efb/zafirokoradojeza.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/65283972098.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_off0000b6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6ED 17124 bytes
SHA-256: 44417aba3898c9ed3998adbff1c2a62ad68c4e757a0e3003cec4de4dc7795533
font_01_sfnt_off0000e375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE375 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 10540 bytes
SHA-256: b8fb0688cffc5e4ca5f26d5cfda448d2ad2af1edf2845cf778b1df498d37b77b