Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5ef030f11d6edb…

MALICIOUS

PDF

54.7 KB Created: 2021-09-19 04:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3047b4ad2605c2e81af82e70237d76fa SHA-1: d182d71b36e2462ce204ffd87a195b5e663251ef SHA-256: df5ef030f11d6edbada2de132ac11c18f0f8d6ce75201ac08893e5740ffc1641
124 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism to distribute malicious content or conduct phishing. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates a pattern of using many distinct, disposable hosts for links, reinforcing the malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8155

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://hanomanberjaya.com/contents/files/11455439001.pdf In PDF document text
    • http://exima.kr/userData/board/file/83218660582.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16133c6d2d8ad6---niwiv.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/jj2d38m83mlar8a3p1vso7ck64/xapurabefobezilepin.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/tigedazed.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/jijeginajijuluwojunutis.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/31558252947.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/bagigiribobufunagoxisaw.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/rudaretagokozisiwatedikix.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/xuxasejudefag.pdfIn PDF document text
    • http://comitatoamiantovelodromo.org/userfiles/file/gipegaremuxebugijomago.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/kogibunitena.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/68549498312.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/muxojukotave.pdfIn PDF document text
    • http://kcemsp.org/upload/editor/file/53098459062.pdfIn PDF document text
    • http://firsttimehomebuyerstudy.com/images/file/ketasu.pdfIn PDF document text
    • http://hotelrealerimini.it/userfiles/files/82370627193.pdfIn PDF document text
    • https://emailchopper.rockeit.com/userfiles/file/kofej.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/deloziluvesesogot.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/zadom.pdfIn PDF document text
    • http://recviem.ru/img/upload/tawigarikuwujedoseniximom.pdfIn PDF document text
    • https://dukupahit.com/contents/files/30305918831.pdfIn PDF document text
    • http://arsvet.ru/img/upload/jadunevosoxut.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/81704731580.pdfIn PDF document text
    • https://giaiphapthietke.vn/media/file/files/54351814456.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=call+barring+apkPDF 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_off0000b36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36E 15188 bytes
SHA-256: 737faa1a28d1e978a0eb677f17176b7b301e95539afc11921a6a869335d5c6e9

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