Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5952b0e76914f67…

MALICIOUS

PDF

71.8 KB Created: 2021-09-05 09:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3420ce3f46a382aed0bcafc8bdcf1c52 SHA-1: c0b95312f7ed766a320d5460c7c31b215b43dd7d SHA-256: e5952b0e76914f672c479211a60b8dd848c2ec7a7e61935255aa82150e993d6d
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of multiple external URIs and link farms on disposable hosting supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5249

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://lentes123.com/aym_image/files/52998690800.pdf In PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/86e6d66b3b759b07e04f81a862c4c522/94109895397.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/16662649751.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/75841136291.pdfIn PDF document text
    • http://okulsanmalatya.com/imgup/file/lewukado.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/42154267822.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/susomalilikilibuf.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16096b324a683b---11016297545.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16071c618c92e7---36489425535.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0pbf8c0mbpgajg9v7dvi61ofh/74445901957.pdfIn PDF document text
    • https://somogyplusz.hu/files/degepawozovemen.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/zetanimunopebonov.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/pipigosivazoxo.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608229aabcea0---zoripi.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021062320154541.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775a5d3945f---76698971370.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608eefd00114c---64364729394.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/juvujekezusibe.pdfIn PDF document text
    • https://mimpisiluman.com/contents//files/97868792401.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/nojigamitinovunabisoligo.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/zipupexa.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/rs0c8rlkfnnk24bbaackat6tk7/33031818106.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/tubinizivuvixafaterag.pdfIn PDF document text
    • http://torgoborud.org/images/file/darapipazo.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/52059997464.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/cdrdd15jhm65hbuu5btnn3fg22/sesiwumosasobokusevi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=repair+pdf+documentPDF 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_off0000d59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59D 10712 bytes
SHA-256: 87b049a33edf643211bd6a6f2699e371a7ed9b626a2272b7be145eca8c616453
font_01_sfnt_off0000ee2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 17376 bytes
SHA-256: 2f39b03e75723f752556b1fe241cd333c32c4c2229ad96c47c0945c9fe5e7945