Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc230bc4547a886…

MALICIOUS

PDF

68.9 KB Created: 2021-09-23 16:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 34451eb0b4a6561edc2f1f7dc19f990d SHA-1: 5b47a05e7b800508ca0f5216a278a5cd9fede62f SHA-256: abc230bc4547a88608e9d46ef85e26280e9187a1f1693013c4cd712d13becbf3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the PDF structure itself is indicative of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9137

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 http://ipai-bg.eu/img/file/mibisajogogigalibalu.pdf In PDF document text
    • https://kalimati.in/userfiles/file/78119107517.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/vodumiwanarofejofaxukiwe.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/kafaxavage.pdfIn PDF document text
    • http://sakulchaiplace.com/Uploads/file/fefuwavizulotagi.pdfIn PDF document text
    • http://thepducphat.com/upload/files/vefepine.pdfIn PDF document text
    • https://acerocorte.centralcms.cloud/galeria/files/towurewalares.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/81463680413.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/bogaxewizoxut.pdfIn PDF document text
    • http://feminella.ro/upload/fck/10190635276.pdfIn PDF document text
    • http://asfalon.com/__files/file/41251972811.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/20496500806.pdfIn PDF document text
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/muborewapuxijoxibejad.pdfIn PDF document text
    • https://lotte-ppta.net/beta/assets/file/gomazagobolukadejelanet.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/38463363032.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/5751e036af0fbb6af7cb05d32ed941a6/98443162682.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/f8c6cfac91e5f1a4f87da2ff19fa35ac/23280760127.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/liferasuro.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/713252433f584248528ce091522c0e81/sipogonomosalagivuzi.pdfIn PDF document text
    • http://kystar.net/filespath/files/20210902021315.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/a92c690440cb605d0b5796dc1c69c595/67303102320.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/90613957061.pdfIn PDF document text
    • https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/latibekenobudazidoxarimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+long+do+deleted+text+messages+stay+on+androidPDF 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_off0000dc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 18848 bytes
SHA-256: ba5e360ce24cfd82e18868c18a2577692b97abe8e7ad045afef0e076490bc9f4

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