Malicious PDF — malware analysis report

Static analysis result for SHA-256 486968f181bb50b5…

MALICIOUS

PDF

74.9 KB Created: 2021-06-12 22:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 99e9ab7601ae3835882a9c62bf6c3de4 SHA-1: 7f45675f0909e8efc289d1ec41fad818087a24aa SHA-256: 486968f181bb50b5c9d3a3e4f0e61109baef9dad462aa78f7ca781b7eb6cb76d
154 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating it is a phishing or trojan attempt. It functions as a link farm, directing users to various compromised CMS upload locations and disposable hosting sites, likely to deliver further malicious content. The presence of external URIs and link farms suggests an attempt to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

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://inwebjor.ru/uplcv?utm_term=fast+and+furious+ringtone PDF link annotation
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/1e5b707d331f22b8c2e38cd4b5a1ae27/balolenedifuzukevipep.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160748e35d892f---69116727671.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/7a13d3dde54f1835437c4cd65470f816/40893237773.pdfIn PDF document text
    • https://airshow-bg.com/file/lepubex.pdfIn PDF document text
    • http://babamoleskine.com/files/file/86643533215.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16091e0d41f151---62382326356.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609193f6164de---gagexef.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/05bd5bed7c4d71fca2416351f520d485/84883255498.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d55236f445---xuloz.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca11d9b651---makepore.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160b2be02cc895---bokegasex.pdfIn PDF document text
    • https://isleo.com/i_photos/file/65191573529.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/gibijejirofumonijilimopes.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/pabedoxolekiv.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/fu4a8bbr69j2dic7l6keigh4l4/rofare.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/8386c1588897a4b84d4f3b53264e682b/lujuxegojex.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/89548257286.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608493ce29963---75164653717.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_off0001004a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 5000 bytes
SHA-256: 80826e7aca2eec0423c92bf21032ddfb7c482ab16f63a7ac4be102e0aff11b2c

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