Malicious PDF — malware analysis report

Static analysis result for SHA-256 5535326d6d869c7a…

MALICIOUS

PDF

67.9 KB Created: 2021-06-30 01:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 177227e2adf7f205358ca99f11fae34e SHA-1: 5149bed400bb9812f780c47cb960b77034c90576 SHA-256: 5535326d6d869c7af5d4abc917fc1b99f991c28667f7cf76bef0a5d820cad4af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous websites, many hosted on compromised WordPress installations or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

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://archism.ru/uplcv?utm_term=crna+vacation+time PDF link annotation
    • http://spalovnachemolak.sk/userfiles/file/wigutulefisufirofiguwali.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/v39d29nn14gk0decgntirtd0sb/karuxivomefis.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/vidibemaw.pdfIn PDF document text
    • http://scro.ru/pic/file/gipebolirowum.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c802e8e3bd---19647593561.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/22166832567.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/folazafemufanibafow.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/69afd4ea4532660c4ea750f6d0d6e2a8/73100525865.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/hd5qi1cc5o0u8an3ijo8u1ddl3/rebalaladurodikunizotamet.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075a1fff2d76---35008620553.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c82f0a292---dizozimifanosevopif.pdfIn PDF document text
    • http://jucal.es/images/file/31340400864.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/e06101a7aaf42325d71b6172a14c7177/xufiler.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/85135452232.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/20d4ecdfcd0b7d8a74c6c987cb0e770e/zedamawowonozi.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/28037223419.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608086115f5d7---judaluwabisagavazonos.pdfIn PDF document text
    • https://hpsoft.shop/upload/files/25640300129.pdfIn PDF document text
    • http://charivne.info/images/file/wasupizobapepizidejuda.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/vigobakotev.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713391a8a0c---saxiwis.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16073ca95862d5---bujutexiwijozubude.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/162344365797596933522.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/dolowele.pdfIn PDF document text
    • 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_off0000e7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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