Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d1b7ea4736d3c5…

MALICIOUS

PDF

79.0 KB Created: 2021-07-16 02:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9eb04c031e1f651cd32ad2ef21ca2f91 SHA-1: 06f8a85b0c11bd86da77a8b755fdf6c79e24766a SHA-256: e8d1b7ea4736d3c51a6b2ca316f8e1939dc4131275a01a7639f25b49acf2dfa4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the embedded URLs suggest an attempt to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6770

Heuristics 6

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc30f5337a---95613834251.pdf In PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/qtsug83ijpg01uol5pn36a0t8g/noxalalevexutazemibenokaf.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074f9f921c74---35224819001.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/10653609486.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/aqbuv3t7p1umqi3acop95o6mi3/vinawe.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ikkagcbtf0a4k3qggm0msouto1/37558847049.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948074de3ec---kupos.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/dapofovogevomepa.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/2f91a989945e11ffba646409ca1643d3/midosiwuwiberi.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/62409443346.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/87340185066.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ea6898e3e---nakikopelof.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bc05e2e7d---75545228993.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/903dd20e1c4d6209cdbcf2192b2c6e27/nipodejivewekepin.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c736c7df110---31612695562.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/dukonotamudidaxakola.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/ba510ca0448be2f06ffde581db138937/58492558486.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608649a47da0d---52759568242.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/76932783847.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e620259f00f---vatusaz.pdfIn PDF document text
    • https://energooptima.hu/upload/File/pokale.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff9a56c5fe---jejekikiwigulezimevolovu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=extrinsic+motivation+scalePDF link annotation

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