Malicious PDF — malware analysis report

Static analysis result for SHA-256 30628f77114f61d4…

MALICIOUS

PDF

77.6 KB Created: 2021-09-06 11:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 965da6dbdb0dcee8ccffb4ed40e2576c SHA-1: 645d16d835f80cfcd371fd52df76478b4b648b92 SHA-256: 30628f77114f61d450900c990a566e2993031a7b5710759d458cb889bd8580a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate an attempt to distribute or phish via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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://otterdisplay.com/userfiles/file/ginepozebez.pdf In PDF document text
    • http://dreamcatcherltd.com/userfiles/file/kupekafafetirumuk.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/66669971148.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/3299ef7c0b8951851cfb5aec6590d824/pozelefepanavoxazuxopej.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c09ff035c---pisimuwoguvelusopa.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/75805619121.pdfIn PDF document text
    • http://stattus.com/assets/file/panezas.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents//files/lixirafegowixusojos.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/3208760e73b8e2b64d66aafffbbd0845/gexoxewuj.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/62402431725.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/susowixej.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/77071764143.pdfIn PDF document text
    • http://toonesk.com/upload/24538121845.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/vasovurowabageli.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/c1a00a74edb0aa8f8a83bc8f4b510947/sowusuritevipit.pdfIn PDF document text
    • http://ccshecea.org/upload/files/11804526001.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609176eebbc15---105804091.pdfIn PDF document text
    • http://earthtalismanjewelry.com/clients/b/b2/b27d4d76c51cd35ccef873a204118430/File/1602071906.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb56828b620---bigiwiwuk.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/javabivezododebebaz.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/44731966933.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/gevome.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/nudavalafuxexuvoratoke.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/xuxonajexinido.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/kobajefuzez.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/17458363397.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=writing+chemical+equations+worksheet+docPDF 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_off0000c80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80E 18052 bytes
SHA-256: ed895501486b558a23e43b074467ad35322a40d87742d18c1cff4a61275d1485
font_01_sfnt_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 11232 bytes
SHA-256: c4dd5848f4bd23dac94732f84b3c5864fad08b96283db064c8f033fb5cf28f36
font_02_sfnt_off0001108e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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