Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c564bce5319169…

MALICIOUS

PDF

86.6 KB Created: 2021-09-12 11:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ec5478c62416fa3b7b7eabb63a160b2e SHA-1: e69a177b985d45dc889a2a8e6d8630eb151ee6a1 SHA-256: 65c564bce5319169754b71a22127adff0480bac3f92681c75a2ab115a8afb22d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains numerous embedded URLs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pixomot.ru/uplcv?utm_term=how+to+transfer+files+from+phone+to+pc PDF link annotation
    • http://jysfh.com/upload_fck/file/2021-9-8/20210908233401783364.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/voxijepase.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/sapafipepe.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/91736047974.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210906_091018.pdfIn PDF document text
    • http://netflor.pl/upload/File/jolevewujazereza.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5d8a5bf0c---rokofepoba.pdfIn PDF document text
    • http://cortocircuito.trialpanel.com/images/Upload/files/31176528303.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/59007021903.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/moresetoxarikibupugom.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/98294381724.pdfIn PDF document text
    • http://unitec-egypt.net/userfiles/file/vuvopagiku.pdfIn PDF document text
    • https://motecx.com/images/file/nosetewib.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/vonadijitakufiwamejo.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/74732923874.pdfIn PDF document text
    • http://potya.com/zagegigezapufukeramexaf.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef6f19805f---luzukikemupabezozow.pdfIn PDF document text
    • https://fuoriscena.eu/file/89014087853.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/71659233880.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/gajufofaribenabowagi.pdfIn PDF document text
    • http://dr-temt.ru/images/file/lulolexo.pdfIn PDF document text
    • http://packturf.fr/files/niwopex.pdfIn PDF document text
    • http://candientushinko.com/images/file/84370614138.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/tuxeriladazirodujed.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/54631255173.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_off0000ef9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AE 17000 bytes
SHA-256: 3278a9fca1d1bdcfb1f5939a1e46cd57ef5958eb4584c6d5850a3504f4aedd46
font_02_sfnt_off000133c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C2 10824 bytes
SHA-256: 6e2cb4188ff58ea8108679b47ac69fff135c1c780265b4678f0cb1542fff0c56

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