Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbe2249b2b91bda…

MALICIOUS

PDF

72.3 KB Created: 2021-09-04 20:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bcc7c35250615cfa6666ac797534c609 SHA-1: 029d7dc10587c5eaa987e93fd776adc49d7cd563 SHA-256: afbe2249b2b91bda50adaa3271eaea3d666d4a396174dc2095114b5c13139fa7
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, a common tactic for distributing phishing content or malware. Heuristics indicate it's a link farm on compromised CMS uploads and disposable hosting, suggesting malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7671

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 https://wastran.ru/uplcv?utm_term=george+estabrooks+hypnotism+pdf PDF link annotation
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ba2079f30---28280702468.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/97613884779.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/97405381545.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/83310124510.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/64870241779.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/16349727386.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/winisavozitekisezajapidiv.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/bopomoguverul.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/21153312045.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/72280881658.pdfIn PDF document text
    • https://beruanglucu.com/contents//files/86494656894.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/83424703427.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/aurf0o7chlu846btk803dneqqk/98621353610.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a6adc9b8e08---75397567915.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/spbp53domnu8oke44fbt9mq1n9/regetanizabutolekazasup.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/4e9edacbb8434ab17028f69511710ba4/27615840445.pdfIn PDF document text
    • http://hawkins-kearney.com/clients/f/fa/fa1934e8f236f3272fb98c88546bd003/File/90297190096.pdfIn PDF document text
    • http://salkim.com/userfiles/file/rebafen.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b28c173a8e6---17244688511.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/f37h45d2to4tvub8mjsjl8bk6m/gupofineremeb.pdfIn PDF document text
    • http://amdind.com/userfiles/file/77571981294.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/34190359613.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/35204566202.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/dedofivuvanito.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/14407460112.pdfIn PDF document text
    • 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_off0000f6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B3 19612 bytes
SHA-256: aa9027d7841c8c8ea86c4698da21dc1edc4f4428b1f4ee7ed5692aaaa4ec687b

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