Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee85fbbe4a5fef2…

MALICIOUS

PDF

89.4 KB Created: 2021-09-19 17:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 83eaa33fa12d9654876019d0849c612b SHA-1: f85024efbcfe4f026ef1487096dcf2b49fba1af9 SHA-256: eee85fbbe4a5fef2ea0e3d9d9f1721c3c67a0d754b5e11849a1eab6c429c040a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, which are characteristic of phishing or malware distribution campaigns. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting the document acts as a link farm to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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 https://laborke.ru/uplcv?utm_term=ships+in+the+night+a+martha%27s+vineyard+mystery+watch+online PDF link annotation
    • https://betsin.org/userfiles/files/kumiloxokogevoverobus.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/53811657218.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/84327434193.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/8701265603.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/85849285137.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/zupoxerebipokerakukeredew.pdfIn PDF document text
    • http://hanleyresources.com/images/21496988065.pdfIn PDF document text
    • https://izr.fr/files/fiwasulevag.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/refaxafinesofukizaneniku.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92950659966.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/6407990724.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/oo9aqca4429kc9rhaj1vtn6r70/95352794790.pdfIn PDF document text
    • https://livbiopharma.com/userfiles/file/losiradabososom.pdfIn PDF document text
    • https://capecoralliving.com/media/file/tigepi.pdfIn PDF document text
    • http://vivaldiskibus.com/FileData/ckfinder/files/20210901_7F5D04E61FA9C5E1.pdfIn PDF document text
    • https://phnews.ro/files/file/sebuxok.pdfIn PDF document text
    • https://gibidesign.com/fckfiles/file/tamedelajamojek.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/62928984536.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131473d3c6ae---41084394050.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/nixibikefafokalawekojopo.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/nefavurugur.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/23594384289.pdfIn PDF document text
    • http://studiodelcorso.eu/userfiles/files/wagebupik.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_off0000f0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 19736 bytes
SHA-256: e6771ff5bebdb77face0baf2dff39c29be4ab5873428200c0361eacfabd55bce
font_01_sfnt_off000124be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD5 11336 bytes
SHA-256: 9b977ca24b655028e15e478a055443230e99dcbe6a8a7188b9dd6b606176924f

Open this report in the interactive analyzer, or submit your own file for analysis.