Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a07cd542fb38689…

MALICIOUS

PDF

75.2 KB Created: 2021-09-18 06:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2deb4ed29c48852e9f54e32cfc7a8d46 SHA-1: a880dd105c0eaa01c190f3732b955771f7fd7e70 SHA-256: 6a07cd542fb38689e4703ea42048cb84f914a95ad81f826477ae0e56d7d2bdad
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://abdon.madteam.net/ckfinder/userfiles/files/nadejifudafonidoxoxevev.pdf In PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142559a04d6f---rarapuponuzeruja.pdfIn PDF document text
    • https://enilubricant.hoakhanh.vn/uploads/image/files/65969787428.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/jigusoximovolijotikofigox.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/20803465686.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/35635078224.pdfIn PDF document text
    • http://altronic.pl/!mag2011/userfiles/file/juzefasujenese.pdfIn PDF document text
    • http://coconut.hu/userfiles/file/nebav.pdfIn PDF document text
    • http://www.bandungmesin.com/file/tinuva.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/zemulizerofatesaga.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/95336487653.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/97381254519.pdfIn PDF document text
    • http://gymostrov.eu/gymostrov/userfiles/file/49121917421.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/majimawebitudixepekoviwat.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/sirideva.pdfIn PDF document text
    • https://casadko.fr/userfiles/file/tolenilu.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/81175359737.pdfIn PDF document text
    • http://nwhouse.ru/uploads/file/nizafifonugu.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/11509546248.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/af61cc3dac0210ba5bfa0f564a1cf1c3/46618978684.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c39f15379---12777234745.pdfIn PDF document text
    • http://generoussecurity.com/uploads/86189255913.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/52924113505.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=zelda+gba+romPDF 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_off0000c2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B9 18032 bytes
SHA-256: ab0febf7dc48384e79412c92ff7962d0120f0e14f05276b88285a6b130029a05
font_01_sfnt_off0000f0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EF 10232 bytes
SHA-256: 4dac406514fa2be94a5265c7695f2d4ee91f9dca883c6d03938c4396cf26cfbc

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