Malicious PDF — malware analysis report

Static analysis result for SHA-256 07152e0fa31564da…

MALICIOUS

PDF

68.0 KB Created: 2021-06-25 04:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 497d51cda99f686b536b758a4fdc7208 SHA-1: 258b950e79978c9ce7b30fab60c516b3b774cda6 SHA-256: 07152e0fa31564da774d8af6c8fda785433e20a57036d3de551ad697dc364ee7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, but no clear instructions or lures are discernible from the readable text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8321

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://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ada83bdd565---7683557570.pdf In PDF document text
    • https://aviatroglo.fr/IMG/file/61296772315.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6cc0592dec---tubuwikopopeledu.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a0c95d5ae---wazeluroriweror.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e10d98eec7---66350929840.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/00335a159d5ec6550847291fd2943dbf/tepulagi.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/bde39f8bc4c44855628bc8ab88f8141a/wiwimiwikujomuwad.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/vodoxutajagonuzijorix.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc225bc6249---55831774296.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/73508919240.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/95631018204.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/0a4dee08e78634340e708ef7eb83f808/47342094863.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/xajuwezejofag.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/luvapidikadipeb.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/78153878720.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=watch+the+office+usaPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD69 4852 bytes
SHA-256: 5e9af33dbc6fc4512ef6c5feccf046de0eb4dd4d53fa7465556e75bf0790c61d
font_01_sfnt_off0000edff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 11580 bytes
SHA-256: 71348b20bc494832a37cda000c925edaefdbd7ab67e791485c6cdc3e21936fdc

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