Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b8964d4f1bd548…

MALICIOUS

PDF

64.0 KB Created: 2021-08-20 13:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 31f92f1e86592e2e0d5fc34ab08e8ff8 SHA-1: 4d8242b705d1bef629d74a0ac157b123a67f746c SHA-256: e7b8964d4f1bd548f349dc75d00b2f17328f31718db5bba24d428a67058f910c
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. The file's structure as a link farm is designed to lure users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6736

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 http://1hozain.ru/files/userfiles/files/nixusukuvak.pdf In PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16083b5da8ca33---seloduvikivosewowufuwa.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/1754f56e29d83b77a1084640303f159d/solibagamiduvefixasim.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/45300301067.pdfIn PDF document text
    • http://dolonchem.com/upload/files/fovimexopegagumokerovufot.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///96899525589.pdfIn PDF document text
    • http://minicabii.com/survey/userfiles/files/88475393569.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/483688dfca2fedef39049e9d5a4fe823/69344084702.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab62ca28849---wabexuvusu.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d567bbe4---72570507853.pdfIn PDF document text
    • https://nada70.org/userfiles/file/feduwupusuzevuvagukuku.pdfIn PDF document text
    • http://nb-magnet.com/upload/files/nigubufitufe.pdfIn PDF document text
    • http://orem.mn/uploads/files/fuloko.pdfIn PDF document text
    • http://billsky.ee/files/file/mazesis.pdfIn PDF document text
    • https://mobisteelegypt.net/userfiles/file/39510026708.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5d676bdcd---terolujujawotokobokut.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160934f4b2cb96---vujizaze.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/b165318417cc0c306f1eaa05f0f6f069/rukodinifijirimazune.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/r98qvqq2c3qpgs3708otjvf5uh/dakajugowima.pdfIn PDF document text
    • http://cortabellanews.com/userimages/65486552600.pdfIn PDF document text
    • https://pmms-online.com/assets/file/12436204093.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/0a442ec35f7f8726f1f3910739451c55/vuvuvusegokixino.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/pipuwuwovim.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/77810363726.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/kmon6tjcappta5g26ichfhl163/zifokebumefofexodefawix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=vishnu+suktam+tamil+pdf+downloadPDF 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_off0000d4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FE 18372 bytes
SHA-256: fc08f6eb960b6b2e3904bef57f4f01d6c6c2f0d7de1961fa45f9beff0548077c

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