Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47db1d6dad6eb2a…

MALICIOUS

PDF

83.6 KB Created: 2021-09-03 05:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fbcd3ede2b605be7229f99f60bbb4e87 SHA-1: c498fefc6bd66beda72dbd923429fe496dd40b84 SHA-256: b47db1d6dad6eb2a73118de4146f89538de150a82008d3da9df54de3cabb6dd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting it's designed to redirect users to malicious content or downloads. The presence of multiple external URIs and the compromised CMS upload links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/ab06f22ad4cf393333f6dc6913cfe9d5/jafosubevu.pdf In PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a790edc34---17645255571.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d12836b21---fuxunovigozobopu.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084935d12157---lowetopozu.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5bddb5723---64816607980.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/noremirazevinolajewademej.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/bigotaweninogovutazum.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16096693dc287d---78440571827.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2dd4d014e1835194df7b9fbe843e8bf7/dojeveworabovuzusin.pdfIn PDF document text
    • http://irths.com/upload_files/files/19798350578.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/fb0c6bafd0cce3639fe4b5ca773b9b7a/16132746448.pdfIn PDF document text
    • http://dothi.info/images/files/59783052288.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/14378364644.pdfIn PDF document text
    • http://evola.it/userfiles/files/zoxufiribabujatagefegude.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/pizizuvet.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160e24cd615e60---48179396431.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/pebenajaduvezukowaxit.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160904f503397f---xedibumovajokanizipupora.pdfIn PDF document text
    • http://shinyoungvalve.com/userData/board/file/jikimowolima.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077671a93bac---duwadizuxuv.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/50977030898.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/4e69814c7024d8fecd62345c24ec52c4/zokovumutopopabijobefozoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=alter+ego+3+plus+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_off0000d8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DF 20768 bytes
SHA-256: 0400ee3acab430431edb4388463d295c30321d42f7c85fb7a0d200aad3782fd4
font_01_sfnt_off00010f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001273d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273D 10568 bytes
SHA-256: 096b6fb7ca2a963c5fb07ce387a49ece01ab022d9b1866e1855a8ab2c060ae6b

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