Malicious PDF — malware analysis report

Static analysis result for SHA-256 687f6dc3ce88ccca…

MALICIOUS

PDF

70.7 KB Created: 2021-06-11 23:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 67f61eb720406f5bd9dd1fcb605de7db SHA-1: 4ce7e732908660fe7e843b6778bf12085d50c118 SHA-256: 687f6dc3ce88cccaeafbb3b56c3884a7aad1617422b59ddb905bb366e481db3c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links to external websites, many of which are hosted on compromised CMS platforms. The document body, though heavily obfuscated, appears to be a lure related to a common question, likely intended to trick users into clicking malicious links. The presence of numerous links and the ML classifier's high confidence score indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7986

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://garglob.ru/uplcv?utm_term=how+many+sides+does+a+hexagon+has PDF link annotation
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160aa376c43ead---49838153919.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebccb3fd42---kaliwep.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/4l8md0do8h5bdi4u3g30n0fl2a/43117452989.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/8ebb1d0696fc17ebb99e56c90dac7e79/97496595696.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a705e45edfd---votulukudopobal.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/gesozamesi.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/rifudofefapaboroso.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/xosoterinamem.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/xirixetesezopiponiretibe.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/jadubi.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/sidedelaxediremerun.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073f42223bca---52195279180.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16098cffc2531b---xejivafav.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/jpbrq6eqgichbffm88opsej6n2/ditaza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 5332 bytes
SHA-256: cd238f0a0ee6d293755672a6aa9259a1f23f98343b0423648a5de6c6c8b7ec8e

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