Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e0fcbeb3996986…

MALICIOUS

PDF

109.3 KB Created: 2021-08-13 02:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f49b71151bf7dc4bf7fd7f445064a872 SHA-1: 6ba48cc1c91c4e47ce2dd03a5d201915c1ac1ba5 SHA-256: e9e0fcbeb39969869b7f4f22c48059030f8922e0cd97ec176c8282c8a464db78
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or conduct phishing. The embedded URLs, such as 'https://coretry.ru/uplcv?utm_term=...', are likely part of this distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9104

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://coretry.ru/uplcv?utm_term=nueva+gram%C3%A1tica+de+la+lengua+espa%C3%B1ola+morfolog%C3%ADa+y+sintaxis+pdf PDF link annotation
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/oavfe4lb2ociun3rr09v5iddl9/70057703274.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/tohhab0jbvel2s9esqkk63q718/60841269119.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/590a62bb34953e970982194a033e1fc9/1359134507.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/91806847993.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/torebofavumaguzip.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160beb673b3fd1---wololewemuluxatokonop.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/lawalekutusijuru.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607815d9911dc---sijaxajonagiko.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/67170052480.pdfIn PDF document text
    • http://cristalensi.com/public/File/tezukazax.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608adcfb933fc---98447635043.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/xefudababaxikavagakamotuz.pdfIn PDF document text
    • http://xn--xhq021fvrwdth.com/d/files/35237425046.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/3cf0af4a8bf4e2420a4445851b5958bd/rarixuravekaw.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a7142454696---zulofiruxawofusawef.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/41067151567.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/3042850024.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/tolokemosidakidares.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/7a8f0158441b6b44d2a13f9d635f6072/97857233689.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/471f97fc796c240d22822bf0a2ad0719/risororozatalevukovigiva.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/gurujuxuvefurutamolalofa.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/88593804722.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160943420a7f6e---57775475868.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/18216415831.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000152a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152A4 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878
font_01_sfnt_off0001697e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1697E 11768 bytes
SHA-256: 5afccb6f5836a71f2b7b2064d0b6a5a553f3c8ec1caa554127d574c793312653
font_02_sfnt_off000184c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184C4 20344 bytes
SHA-256: 5d1ac968b2edabd5a86bebbfb65e8371761f037a232436f548680e0a5a319cd5