Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00c2794f0a0c6e1…

MALICIOUS

PDF

84.8 KB Created: 2021-08-03 14:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 440c3c169dc2f99e849811a480b6c3df SHA-1: d3404fdf1eb4fa68a721a16d1895c7182ae43ff8 SHA-256: d00c2794f0a0c6e19f55a2f9e3e9f4a6ce4ff883ca709e9522d97c3d59741c4d
204 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery mechanism. The heuristics suggest it functions as a link farm, directing users to various compromised WordPress sites and potentially leading to further malicious downloads. The embedded JavaScript stream, though not fully analyzed, likely facilitates the execution of malicious actions or the retrieval of additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://philabc.ru/uplcv?utm_term=realidades+1+capitulo+8a-2+answer+key PDF link annotation
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a141b8c22d7---jolop.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/9640933243.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/b7d76lg4v4jrijs22kijk3rqq7/15266517201.pdfIn PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/27213393894.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/igpgs995c0k0fqo6u3fb982r3o/tamurelaz.pdfIn PDF document text
    • http://cke.hk/userfiles/96342739455.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ecaaf8d2588---puvepoz.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/zixasojojorusadeful.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e54c31924---30663898875.pdfIn PDF document text
    • http://airfa.it/userfiles/file/sutizakeduv.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607449ac7e998---22639618188.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f73ece172c9---26987925101.pdfIn PDF document text
    • http://haai.org/upload/file/82993844599.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/9548399078.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607365a69050c---45704890734.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/55682832653.pdfIn PDF document text
    • http://schule.havonix.com/ckfinder/userfiles/files/tegijepotifezuba.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089218410de1---dipajazev.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/9f6f61f27676e7068e8a7010ba0dea0d/wugopixexobewidisefe.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c63e196c3bb---lixosikabatutogu.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/62856557242.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/burarikezupetitojakani.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/gewowigur.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c72cf50a6ae---juwinax.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///84643331115.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/zoxujoxanodakegulopo.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/mobipuwuwenavobigorivej.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000df87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF87 11356 bytes
SHA-256: 40746969e3a1dfb11ad4666d0f3198de7126e3248749f7ee78e04bb25c7c2bdc
font_01_sfnt_off0000faa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA0 18908 bytes
SHA-256: 5a4d430f733246a2dc9f0d58043e5609bdb5e046c79d7da42ef825f671d46630
font_02_sfnt_off00012b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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