Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b10c306c09a3677…

MALICIOUS

PDF

71.0 KB Created: 2021-08-22 01:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3546bafcb5c5d6cbd166a0abf01144c0 SHA-1: e8c6f7c6bc92cf6a668dbd5042e9328645899cbb SHA-256: 1b10c306c09a3677407fe40cd75f74ad41769778a309b064ccd420d29f39e77b
124 Risk Score

Malware Insights

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

This PDF file was detected as a phishing trojan by ClamAV. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or phish users. The file's structure and numerous external links indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4326

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://dkmmotor.com/files/userfiles/file/59454056866.pdf In PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/62972243927.pdfIn PDF document text
    • http://hms31.ru/img/file/33236024270.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a829fc4302a---11656219285.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/f5e5cdbd968a6d865d217f246b102458/voxevow.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9eee6d0b2a---filizaketusapilaj.pdfIn PDF document text
    • https://lasanisports.com/files/zajolixujurix.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c13de526676---13003523005.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/4785962078.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/90259718910.pdfIn PDF document text
    • https://club-sports.net/uploads/products/files/29990488633.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/13b31cf1e00e51aa8219e1e172e12fad/59522981360.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/nifefedum.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/wivegununekupepilidodil.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/nudofadesumewudi.pdfIn PDF document text
    • http://airsoft1.ro/files/file/viworetasozemurujefowakaj.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16079f44b10a6f---wakoresojogewupoparidebid.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160bebd037de44---31304478246.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa338329774---41436704876.pdfIn PDF document text
    • http://abc-tel.ru/data/File/sijelibovenenowet.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/28090856856.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e663b6db19---wogaxipapumigumomapakele.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/5d916b7541a09452bc9ce7b0988f8a69/88915566951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=butterfly+line+art+vector+freePDF 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_off0000cde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE1 10496 bytes
SHA-256: 349dd42e7d1717ab4ac61035dcc2bea4458408b479d926b4f262767ca5069b9a
font_01_sfnt_off0000e5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EF 15660 bytes
SHA-256: 98cc49246000d68cd1ce1488cf80f0585a1b3c0021f522beb5fa51b2122d7f64

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