Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2bfb451cf613268…

MALICIOUS

PDF

75.2 KB Created: 2021-09-02 22:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5b8505c2bdb9f9dee90f4d7c5d1dd061 SHA-1: 50e0e5c87f442d44eba3afbf35779c045cc70c40 SHA-256: d2bfb451cf6132681a95bb149ea713325cf3d8c00ddddfd24ad53ed2566167bb
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and embedded links indicate it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/7438b7ca4c07b4f181692dcdf67fd3f8/mowenafajo.pdf In PDF document text
    • http://footstepfloor.com/upfiles/files/filubulunajazefekudizu.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/fotitebenem.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/93432616485.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/jezukavodifufuralow.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/velajaruremujow.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/e63e83f3c0ea0204d60fc5311978ebfb/88511789798.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/rukoxamijivajivijeluboke.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d73ad9c6425f5f2e2ed321e963047975/63828975394.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87f9fc0581---91860136449.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/pivuleneziluzoduzaz.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/41629fec20142c9be14415ad94e9053a/55340960066.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/57464982041.pdfIn PDF document text
    • http://tipiland.net/upload/file/kuserukutibonifogimos.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610c06c8a4d3b---napokuf.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/wutob.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb3a909966---84760792725.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/48045536742.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/tasivajekegow.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/rugajesaripovala.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161124c3fe5896---dafinewulopoze.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e23337a4e40---jitipipekolewajeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=ecmo+protocol+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_off0000c23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23F 10108 bytes
SHA-256: 6bfcda89eb3299973667f2fc6abd4d3268bb03bf1bde8889c376dc6349461f5c
font_01_sfnt_off0000d8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D3 18084 bytes
SHA-256: fcb2455a378ac3c5e4368c72de03c9d73669e87afdd99fcbc781091060d78955

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