Malicious PDF — malware analysis report

Static analysis result for SHA-256 0395e1dfe31d8430…

MALICIOUS

PDF

80.4 KB Created: 2021-08-29 12:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: befac2cad4fc4d56d6193941a32f583c SHA-1: 78a1e71cb0a3514fd69d84a037b0cad4dbabacc8 SHA-256: 0395e1dfe31d84303be0808ab1175edd9bb053de7c661e76da3e16b1014ef287
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags this behavior, suggesting the document's primary purpose is to drive traffic to potentially malicious external resources.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2628

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://cbconsulting112.ca/userfiles/files/46946200412.pdf In PDF document text
    • http://tai-yang.tw/taiyang/upload/file/82902616365.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcc539e2ce---4251661287.pdfIn PDF document text
    • http://erictex.com/ufiles/files/pidifikata.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/1428762945.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/saluroduniwokopo.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36884328439.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cccb924c9d---41624194730.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/83287243788.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/gamuzosa.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/50087622005.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/jegek.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/57158319869.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084012859d19---70891748845.pdfIn PDF document text
    • https://susta.vn/userfiles/file/9695748106.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/47946851041.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607378ba4f436---roxetefu.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b2e11b93c54---kezedokerabototu.pdfIn PDF document text
    • http://gaestehaus-am-erlkoenig.de/img/editor/file/39065884719.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/ltrgc8sthqne8jtpbi7oj0o397/31498679541.pdfIn PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa/files/jegijun.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/4f62244c66f4a087c38213fa1fb79829/61439911478.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/70493210982.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9cab7a2b3---fonegu.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/klchg6nidl6dgb4dsfcj5g4991/7930128458.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/92aeeba469f1e81a1f517d2e067c16ec/82619393645.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=psalm+33+commentaryPDF 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_off0000f2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B4 10584 bytes
SHA-256: eb28412d748cb87dbdd5f319f4626687bcac71fa50e0d52597fe0a5ae2ec0f26
font_01_sfnt_off00010afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1