Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dec4914bafa01d5…

MALICIOUS

PDF

75.5 KB Created: 2021-09-20 15:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e00743a4e8927c90127b65687dc8c81d SHA-1: 7738e9acde64eacd9bde94c45eee0a0374ac5de5 SHA-256: 9dec4914bafa01d58c61038f813d13daf99262ed06996b739bbb24408b8b01ee
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting. The presence of numerous PDF links and the use of 'utm_term' in one URL suggest an attempt to disguise malicious content or engage in SEO manipulation for phishing purposes.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://www.loisirs-auto-occasion.fr/ckfinder/userfiles/files/38141164442.pdf In PDF document text
    • http://samuiluxurytravel.com/Uploads/file/82822905718.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/2lo4vilc2f21b2a9vfa2dlqq6d/xatamogisovubifaz.pdfIn PDF document text
    • http://ned.ru/uploads/files/33443186565.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/xovematemegabone.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2e9ff41f4---gomon.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/70884000164.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/45025842585.pdfIn PDF document text
    • https://anjingliar.com/contents/files/topedu.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/jefabiwuna.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/30993581753.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/nenotuta.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/98736066233.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614259325e1d4---26270909602.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/90948768768.pdfIn PDF document text
    • http://vivaldiskibus.com/FileData/ckfinder/files/20210915_85050A6AA23F52A9.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/xiloridenovuta.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/sitilekaxubinejele.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/59584862378.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/hbq80l03cqpoc26uhgdegkjf0m/wemipusadujumafovadi.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/2335c0a759da9bcdfa45ce55caa41ea9/jatatabarujelewerirob.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/soposarugidilinepiwenu.pdfIn PDF document text
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/85084978916.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/kijenebekapebosifojabolax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=brain+out+game+free+onlinePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BB 10540 bytes
SHA-256: a78893c3e060abe48389a71b01788bef4f0038dd51bbe1b463597bd029aaca29
font_01_sfnt_off0000f8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BF 17392 bytes
SHA-256: c65aa01af366738b640f79a973670614f836f1d56cf94f1cdb274cc0167ee928