Malicious PDF — malware analysis report

Static analysis result for SHA-256 027eee7aeecba7cb…

MALICIOUS

PDF

70.6 KB Created: 2021-08-13 12:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5f8b1bc7c89014116480f410edd731d1 SHA-1: 284b84f8148a95aef6781b8e86a0f5b3d28065cc SHA-256: 027eee7aeecba7cbed10e7615886988a8a3a829c41b50e4a4effa50cf43495f2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be acting as a link farm to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8991

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://avonsteel.com/UserFiles/file/95344594671.pdf In PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/sbvhpgqf6m7a07h2mve7pep7gv/zejununidigilokokixu.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/pamadugapojex.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d1733b836---7471493724.pdfIn PDF document text
    • http://zl369.net/userfiles/file/legozusisasijoniwobafot.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/46557341921.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/70b83edbc9f580c01de18dc27d028abf/77022578416.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/vebej.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/riduwugiduxemuwog.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/fojobofased.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/11c65feb0fd48093563bc7a068ef601d/rimatujogo.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/fopugitoboludowar.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/70108244464.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3361b691a---lowusedazifarafinemekasog.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/roxolefimobolesu.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/dofolosuvarevotagamiwupol.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a75cb49b0f---3090460243.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f31073a08c9---vosilewazosixi.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/s8eqfk94se418bv33hmjpsmgu4/84045070899.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/7b170ruj6oj8bnnabdjg061qis/4749983408.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e872ec8f9---94800092837.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fd29bac3a0d---zipotizoxopamezikusogi.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/vokekuni.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160df899307d9c---23504470128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=exercice+corrig%C3%A9+pythagore+3%C3%A8me+pdfPDF 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_off0000f05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05F 11428 bytes
SHA-256: 152d26cba64db0ec807c19593d8ba01c977f0d84682351015f7935ba6cbb5dac