Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b4a735365b0338…

MALICIOUS

PDF

84.8 KB Created: 2021-09-19 00:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cad1fdf13dc9643b5a5d3a8390294bd1 SHA-1: a23e7fe87a6a7055ec3d415105c6dc4c61568cb9 SHA-256: 29b4a735365b0338f4855804e394ec417035326999ed66ca0e6ff3030a8a5d07
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to various domains, some of which are hosted on compromised CMS platforms, suggesting an attempt to obscure the final malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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://forti.in/userfiles/file/gagewefopunotibexetoneg.pdf In PDF document text
    • http://hondatayho.vn/images/ckeditor/files/buvenosilepafoxupu.pdfIn PDF document text
    • http://copy-office.it/userfiles/file/86985635742.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/9341363459.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161389bd1cf03d---mabekizu.pdfIn PDF document text
    • http://ifap.it/images/file/dilizadilu.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/vorimanebigag.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/29604351611.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/36907199749.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/gadujufubokuginipalo.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/12576929842.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133563c49939---56237374362.pdfIn PDF document text
    • http://uniontsg96.ru/admin/ckfinder/userfiles/files/17908316562.pdfIn PDF document text
    • http://105chers.netsociality.com/upload/files/ladalojetidemos.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/50087041574.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/5801121203.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/tizefejagawotixitobud.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/gaponeridavewidetuza.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/30319882062.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/fepisuvotafibal.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/3ea0e39f96bdc027e3b9ef4a9d402281/zevopem.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/topomudapi.pdfIn PDF document text
    • https://www.cygnusdvlp.in/nitdurgapur/uploads/editorUploads/userfiles/files/56260574139.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/fidomuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=memes+quotes+tagalogPDF 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_off0000e83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83F 10392 bytes
SHA-256: 05a783719fdcb5ccfb1b49fc2901f54fde4ab3a8d7e3484464befaa6053bd3bc
font_01_sfnt_off0000ff8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8B 18008 bytes
SHA-256: 17ed5114bd5226f1bba94a27eef3bbf76fc19d4478b036d26f872829fdab7667
font_02_sfnt_off00012db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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