Malicious PDF — malware analysis report

Static analysis result for SHA-256 765e14861d390892…

MALICIOUS

PDF

53.5 KB Created: 2021-09-07 15:34:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d62f74e6f80b2dbcb128735dc463ee52 SHA-1: e626e60733e6318eb44ceffff98e2ce346cc7814 SHA-256: 765e14861d3908924ed02aee74839a9de5f56cc7d8f64086c0893389564908ca
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress uploads, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded JavaScript likely serves to exploit vulnerabilities or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8410

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://www.santaterezinha.com.br/js/ckfinder/userfiles/files/paxafumelexozera.pdf In PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126ecbfc2bd5---88753471795.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/0ii265d6j7cqt0l6ammqiusg10/safalulololowone.pdfIn PDF document text
    • https://camelcarpet.org/d/files/18044361262.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/23270881769.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743a81da8d5.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612716f648670---37448765145.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1630230787.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/83090712257.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/gulepuzomuwumixo.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/65670759411.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/86854393109.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/petamol.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/34107696538.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4s68792u0ab1333aelr54ps0t4/nesiti.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/96805661650.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/039e4fb41f69e7acd36cfd6e288d8d78/bulowitepudojokus.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/7cad842cd7c32215bde84a994cb1c080/jiduwedoduselupariju.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/73ae75e52c4410a07a562b30d0571960/makurajavaxip.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/9162922960.pdfIn PDF document text
    • https://agermag.ro/mm/file/vabekile.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/18579842359.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/57607880994.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202173713511100.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16071984583806---sarevunap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=export+html+table+to+pdf+using+jquery+jsfiddlePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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