Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebc63db52a8ecb0…

MALICIOUS

PDF

123.2 KB Created: 2021-06-26 13:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 341d2044a1a88adca02af60943e70417 SHA-1: 96d3a115a039fbc49cbbb241cfff067a5fb81bde SHA-256: 0ebc63db52a8ecb097679e027c8b24e70650c0f775026f0af2b7abef05916b91
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm strategy. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The primary goal appears to be directing users to potentially malicious or SEO-manipulated content hosted on compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6513

Heuristics 5

  • 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
  • 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://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/f80452d8038395b8e4bb187239b5dd9d/gakufawepabuzenen.pdf In PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160840aee87a8d---5982287845.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/fibiveritafiwelem.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/febujeborowezisitezejidig.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/zulikelitosojewawevom.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/90730646918.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/0d7374f221614ce81844404c862c53f6/nifisopomuvazif.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/a2a2eb89a392i26vs98euj0ias/julitotudotizopev.pdfIn PDF document text
    • https://zold-kommando.hu/files/56374474084.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c803f4c309---vixepun.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/vesalelavasidu.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/gischjog6qhgnlugeoq49ojs45/78352580835.pdfIn PDF document text
    • http://avonsteel.com/UserFiles/file/pomutamirorek.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/d7c214cedd7a9caec40afcba8e03d169/vajokazejuripofuj.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee919c09a5---fizidosijagozale.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/79801907458.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/163aef514016e434e0cc10e8cd209675/bonezavibab.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/d446ca17b3fe2ae62c442f07d4c4ae17/65422155215.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/0t4i87fhh8joqq9ld20njfcv6m/23429739902.pdfIn PDF document text
    • http://praguetransfer.com/files/file/50857822111.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3d382a7e99d854a7caa1cd6e24be2ee7/sawinafiluvuzifada.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/winuzopemifi.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/farezipul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=unix+basic+commands+with+examples+pdfPDF 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_off0001bb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB03 18576 bytes
SHA-256: b4a883b5db969ee80833d6783582e25e05c3b560773705d8a41d8641615c3700

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