Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb9d0afba441148…

MALICIOUS

PDF

136.6 KB Created: 2021-08-04 01:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3c1b875f1219d75d305c41293bcda811 SHA-1: b993db32a8897fe5e30bf8cd41305456bf542ce7 SHA-256: bbb9d0afba441148e0bd4f774013945499312456b8a96d977645fa10c4300f84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress upload storage, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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 https://irlanc.ru/uplcv?utm_term=como+crear+un+servidor+en+minecraft+con+mods+1.12.2 PDF link annotation
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/i5avf0fg2i8i4rset1r3e00u0n/tibegexiragafatemit.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/tagemajax.pdfIn PDF document text
    • http://71mhsreunion.com/clients/f/fd/fd19d29f3ef40f7e1d0269d1df38e7d4/File/tovokadafikifojisezamogi.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/foxarurinuzubesijof.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/69909791940.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/5cd51faf3d0f14087ea28bfe41a11a12/409170406.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/79653574422.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/xivojase.pdfIn PDF document text
    • http://xinge168.com/uploads/files/20210721093159_262020.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/bonajewatofedisezidad.pdfIn PDF document text
    • http://jngf.cn/files/file/fazefu.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/zavowarewas.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607011ea412f4---219710335.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/pibuje.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fc8cf18a1---52798592497.pdfIn PDF document text
    • http://unityproductions.com/upload/files/27175864351.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/27626788473.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bibibukufolav.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebaaf65040---tejiba.pdfIn PDF document text
    • http://dalaichau.com/files/lawixijosabapuxawovog.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba152f85639---derovi.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A47B 20332 bytes
SHA-256: b3c248c8222adf788e0f82d2e766ca4186ec1f1082dde957bae7cdba53fece77
font_01_sfnt_off0001d87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D87F 1708 bytes
SHA-256: 5240942d5b613162ca1c1995620a67ddfadda72e1732495c7c3c81265e1c7713
font_02_sfnt_off0001e08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E08F 11028 bytes
SHA-256: 5a39645866c6fa052ded39f295ee47ab676ed9c8ad51934d82b7a1eceaccdbe2
font_03_sfnt_off0001fa53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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