Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee6dea4148477ab…

MALICIOUS

PDF

83.9 KB Created: 2021-07-17 12:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6932d7d0c261e40f56edeb37eed1a5af SHA-1: 6ab4b956d643b270b5e47b9ceff84ec47c4ba9c9 SHA-256: 7ee6dea4148477abe86aea5cb166b31c9a7a98fc46b3d5437112d43e3375b0ef
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating it's likely a phishing or malware distribution lure. Heuristics indicate the PDF acts as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the overall structure suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • 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 http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/lejuvipevizexasivopawim.pdf In PDF document text
    • http://sammyuriasproperties.com/userfiles/files/36219449559.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/aq604rgafdvcv1qs360j6m493s/87878675845.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b385755e99---57635862018.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/xasitovijomal.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/klftge33qljd5dmkftcm88skq2/jovulalepovegesaxojujugin.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/01a21dcc8d940bedb58fbf7a3b28c195/nafonoxabatomosepafafebo.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/zudelelugebalitipo.pdfIn PDF document text
    • https://okna-kursk.ru/page_edit/_samples/userfiles/files/32458124382.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ln146hbt6n1hahprvu5mth5uav/67092742951.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/6d76d8ff2656c0aa629820006c725748/3087030484.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c0387075aed---94719088910.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16097c3f6670ad---36428503453.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/664b9eb6888b8660fc1646051213042b/58634263044.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/23943920052.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0dd00d545e---70833949336.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/57609269579.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050113011230.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e13d4aef798---xenuvara.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/69705744539.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a0a178da60deaa3c3d450c269f87c3ab/xinategelejo.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf42c71dc7c---fokaruvudikejebofom.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160858404ee4bc---larakitugatadufux.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/sazejigalunivonebefod.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/77225888568.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=divergent+plate+boundaryPDF link annotation
    • 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_off0000e5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE9 10820 bytes
SHA-256: f63fbb130b1d53db170149a5f1e7cdc031c03e2728ace329f913663cda4fcb4c
font_02_sfnt_off0001168c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168C 16780 bytes
SHA-256: af2149dbe76f0095173022b687d56563df071be5891c1cb985cfaebffea6011c

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