Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda5ea6b5117750a…

MALICIOUS

PDF

62.3 KB Created: 2021-09-05 21:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 97c8707381a69987370cc74a36437dce SHA-1: 61315ae39842696d2d6d5dd71c591a74c378e4c9 SHA-256: eda5ea6b5117750a6ec997ff2e74052ca22b67527092add2d0f888baae788b7c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9550

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=volvo+truck+parts+catalog+pdf PDF link annotation
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b0c36c0dc---45052367951.pdfIn PDF document text
    • https://anfauglir.com/images/file/99107051149.pdfIn PDF document text
    • http://dymenahealthcare.com/upload/fckeditor/file/68204379630.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/dirikikevuvugiguf.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/gififuzexijojuwol.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/govadozor.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/a2232bd69b9db1bc8e1fdc594c699583/rogapimuduxopule.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/25259066469.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/1410550212.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/botam.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072140734129---tufaxazijisodaw.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/73083577049.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a4f0d8280---vuxabodapo.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/36909170430.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/174193964461123d85d9dcc.pdfIn PDF document text
    • https://yildizwebpaket.com/calisma2/files/uploads/1575212093.pdfIn PDF document text
    • http://yilip.net/userData/board/file/jaxazivoxobigamif.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/48120fa4ee02236aba71ee662adf8d35/74340963381.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/zadurix.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c503b7680c---wifokobuvolazimav.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f598f532e7---56092050698.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16209877897337.pdfIn PDF document text
    • 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_off0000b7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7DE 17408 bytes
SHA-256: bf3132350d826163d20ea52cb1aee50ea2b0820bcae90ce77c795cd8d4a5e3a1
font_01_sfnt_off0000e4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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