Malicious PDF — malware analysis report

Static analysis result for SHA-256 229828cceaa376c2…

MALICIOUS

PDF

89.9 KB Created: 2021-09-06 14:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 626fdeab456d2c070b7a985a1b689f73 SHA-1: ef7a57855903df49973dbd7a3b09143c2ba63c0c SHA-256: 229828cceaa376c2bd0578736c7ba0e1139efedc07f9eb9b67ac9010b8836878
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a link farm with numerous URLs pointing to potentially compromised websites and disposable hosting, suggesting a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to lead users to external, untrusted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sutejudiwitupebazo.pdf In PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afd75e8d7ce---ludage.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/situbabosanadexujebuza.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/70728587413.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/47280919600.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/18745516303.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/61466055651.pdfIn PDF document text
    • http://boursemoi.fr/userfiles/file/25583908672.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/warafasixarezijix.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608402194e8f1---kobugap.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/57196683878.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609df4aa155d5---65804405869.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3cc4b73c4---walovixes.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c884702ca7---dubopivaferoxobimi.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730e00caa80---fogujarebolumobasifaju.pdfIn PDF document text
    • http://warwick-ems.org/userfiles/file/gakegeb.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c9f6b225d---wivinafenavuzamusolanave.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/5bba2a3c3308b52f5c72fe637396e9fc/8883819761.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/norodujofafozasaza.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/99440437240.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/digaxogi.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b9ca95259---52785889662.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210716_E07714739853314A.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb8a25d6c1---vufomokutitewojokose.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=kasaysayan+ng+wika+timeline+pdfPDF 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_off0000fb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11320 17608 bytes
SHA-256: 7cb35903e3b1701be674a69c422044a49eab560c23e44e07d9b62f6ec17e85c3
font_02_sfnt_off000140fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140FD 10904 bytes
SHA-256: 4ba5fe188be02d3026e0733a127e97dffe14ba2b4deaf23bc0d6bd84d8401e4e