Malicious PDF — malware analysis report

Static analysis result for SHA-256 2602421d90ef3413…

MALICIOUS

PDF

77.7 KB Created: 2021-07-26 08:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 84263b687bfe95d275f57efa357edcd1 SHA-1: d44013fb9cb68038eed1cd38b1fc2729019e4f34 SHA-256: 2602421d90ef34134bc802553e28967c2624c2755bc32f0d8f9476b0970892f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8596

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160790d626875b---89680677397.pdf In PDF document text
    • http://tecnoservizi.com/userfiles/files/zopizobekolivejilevum.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/234ec885cfcdb6cdb1bb620cd3db172c/6846305724.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/lefivubip.pdfIn PDF document text
    • http://coffee33.ru/archive/file/tiwetikozixonuwariwimiwox.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/19896896670.pdfIn PDF document text
    • http://coumert.com/images/file/zijadolesanofememekutida.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/l25jfkri4g5971ngrfdn93gth2/58091795033.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/wiluxaxerurimupezil.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/73245481331.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/nitifu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160943effa7776---gupasopub.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/906426d963e1a8dd84b81c3630a92f6c/93814720854.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/nuzil.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/jadulewujuvanitaf.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/5bu0p1boemlci8h6gmg576r41k/30488315134.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c68602b8be4---3892082005.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/79863488692.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa1877e276---zafowusesutujazegeril.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b222fb841f---75024656762.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731b9f4601b---47252690580.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210717163536.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/43322298349.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5af3ee3fc1---lafejapevizimubiv.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b421cfca1---46719064548.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+replace+the+drain+hose+on+a+kenmore+washing+machinePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 16436 bytes
SHA-256: 9a43b636ff54d6c148ad66ec850bfad50b3865d43c61e236d7c530faa121f004
font_01_sfnt_off00011cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC6 11132 bytes
SHA-256: 9d04765ac480fdc697613bbd29bbeb42efd8fe191f34bde0c92b44f16b0f7bec