Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae9ddab74b13c84…

MALICIOUS

PDF

87.1 KB Created: 2021-09-07 21:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a74b614270140ec6f44c2f6d7dddc4e5 SHA-1: ecce94d0f751a2aa0a4206b29cfea5341dee93e0 SHA-256: 4ae9ddab74b13c84ee62ee7a479bc5dbd5e5a0128d6eeec85af2e4ab03b57df4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress uploads and disposable hosting. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious sites, likely for phishing or to download further payloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://babyindex.nl/images/uploads/boredinavoluxidevavir.pdf In PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/140fcc0dcc68e3a2fb65dea95add9333/gorevipeku.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/13281321964.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e21b28317f---91599345456.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/3daa80b6e6333453c0b3c3df6e280624/66996523930.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/38434388515.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d74fd39a8b---tuxizirivikifafesivobew.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/zegizenolomovo.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16126343b0d9f5---xidetodudegizazera.pdfIn PDF document text
    • http://fourfoods.com/images/files/bewifoxelikug.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b370fa532a9---41351341231.pdfIn PDF document text
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/xagimare.pdfIn PDF document text
    • http://eternoohydro.com/d/files/70111820843.pdfIn PDF document text
    • https://jagominum.com/contents//files/duxazizabal.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/xafivot.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/84440904539.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/besasumavabezenimosiv.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/kanopifojebejuranopifuxi.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/05/file/202105282211029795.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0d19288b8---refijelatagulafapekageve.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/12613651082.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609163b12c134---56041094456.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/c74d08fe8f9257489f434fa521a1f68c/xofujaluzud.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/35710616139.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/gubuwega.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608064737aa1b---85571018800.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=eleaf+istick+pico+manualPDF 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_off0000eb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB64 10716 bytes
SHA-256: c18989cb0e2d0e2682a66c16955b898c94362b3b157576b36fe2126cfeb96dc8
font_01_sfnt_off000103f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F8 19460 bytes
SHA-256: 3c05769e7d16cb355f57a6ea56c1445257ba43942d94af104f61379935e8d494
font_02_sfnt_off00013661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13661 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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