Malicious PDF — malware analysis report

Static analysis result for SHA-256 2656099965335e40…

MALICIOUS

PDF

78.7 KB Created: 2021-09-07 20:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aedea1ffa4cbaad7986b5b2d33b2f482 SHA-1: abc60016a6b0622ef9db9f3ae78f1f0db981c32a SHA-256: 2656099965335e40e26912f3cb487a8805f29fa30167bb7b970e33bd8a03229a
124 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm or redirection scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The embedded URLs suggest an attempt to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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://dijladentalcenter-qa.com/userfiles/file/27461821970.pdf In PDF document text
    • http://singer-island-condos.com/userfiles/files/1006442263.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/a1da52bff36823723c96eacf87991c89/65713803047.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609833b08efa5---50177910693.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/c368e8b35c4deffc50b08de98aca98ab/56288194760.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a249c0472a0---dovumaxusogivupopabulitu.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/nomijewotevarovogamavil.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/zagujupabata.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9fbdca832---vakoguwewufokibubumirewu.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/70559004204.pdfIn PDF document text
    • http://esistore.com/userfiles/file/60240939245.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/balapopolupotam.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6db5bfb11---kolige.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/sulukan.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/59793373593.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d57d90a21c---kajukozidufosowidorokama.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116f3006b272---mirowepigarebesid.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160adf0e437295---92525529594.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210618_1E2C6641D79755EE.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/nuvuzajidajugakonudolo.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/jezosomumunojizugazivavi.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c793ce1a70e---maxagivaw.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/wutapunegekakozajiwu.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/95946804666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=interview+questions+and+answers+for+call+center+pdfPDF 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_off0000f195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF195 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AC 10964 bytes
SHA-256: 88147164cedb71854074a351b90f4d71c257ad9a48804ff288e021855bedc5a1