Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bb4704a45e6bf0…

MALICIOUS

PDF

58.1 KB Created: 2021-09-04 01:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2941aa580bc95414aae864b85cf4d4b7 SHA-1: 10ddc698fdc51b1f25bd25c1fa024c6f2acc9350 SHA-256: d0bb4704a45e6bf067951ba66f1577f7c4f20705b5a6054c6b2bf6ba567392b9
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document is designed as a lure, appearing as a screenshot to trick users into clicking on embedded links. It contains an embedded JavaScript stream and a link farm pointing to multiple compromised CMS uploads and disposable hosting sites, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7396

Heuristics 6

  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 58 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://domholidays.com/userfiles/file/xoxebafufowesa.pdf In PDF document text
    • https://clinicscrm.com/img/files/rewakivopemur.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/82011671069.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/40472a5d9685399e944d9b9864f96c22/detil.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/30055521963.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0106f609a8---59274853160.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/logemibiwimaxariz.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tste1tdgpirfboijpt16rf81sl/15240599348.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610e2007ec0bb---34995284021.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/mafutifepazosofo.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98c471b801---86155660770.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/82e0025b21a71fb317d5c9558f916093/suwowidamiwewizivopujape.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a468205ef9f---39992144852.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/51395055613.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/69872799772.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98902806d---bagajox.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c205433644e---13287424902.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/95202877196.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/zegebogana.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a717e717c---34994314145.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5a016200e---jomuniruxisinufimin.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/savovilefas.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/1bd53544c7fe6c48ad5a8c9a612a6843/4533981525.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a8562f238---22293012502.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f7635e270---1938560969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=bwssb+recruitment+2018+syllabus+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_off0000b7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD3 11656 bytes
SHA-256: 350dfd8a0dd81eb005f07a0a08ad86087406bb6a6871954fd679866f67ce013b

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