Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b13e5e74e945451…

MALICIOUS

PDF

78.5 KB Created: 2021-09-17 17:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 807e164f12e86787fe5f0adfe3c11c68 SHA-1: 75392d68a1178a0743d7b1f10506048e554af7f7 SHA-256: 0b13e5e74e945451ffcd8abb6577a8599b547d435d252741bb9ab13932ec2d3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/49563304789.pdf In PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142363b0b1c0---95017026389.pdfIn PDF document text
    • http://seto.cz/uploads/48423021830.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/d87e0a31403361a32bc18f079e24c641/91615318805.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/84751548782.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409600c2e62---13049733392.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/sideso.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/fudazipumogufenuwimunalo.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/48941502917.pdfIn PDF document text
    • https://klcconsulting.eu/klc/file/38131122638.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/95898115863.pdfIn PDF document text
    • https://tekartltd.com/upload/files/nogezigoloxuba.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/pogiva.pdfIn PDF document text
    • http://htygroup.com/upload/files/77051746521.pdfIn PDF document text
    • http://aven.su/userfiles/file/30698954753.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/wotekoxe.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/98a105a06df77bf8c7d6dc1309f3c67f/kuvusu.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/zikexejizemij.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/tiwasivajinaseda.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef79df3760---sodafizomug.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/51008697000.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/99308347786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=sport+shqip+apkPDF 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_off0000d018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD018 10380 bytes
SHA-256: c064970d842a1e5e7e8392a568c23f7b596a34eb738e9a384648e83f507214bd
font_01_sfnt_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 17460 bytes
SHA-256: a3a0fda02e7744cef1b8d613796fe498718e225f79629e710de9ff73bc289588
font_02_sfnt_off00011506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1