Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e68eecaa2f7cafa…

MALICIOUS

PDF

85.1 KB Created: 2021-09-17 05:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dde54641c8010033eefee3de72866ce2 SHA-1: 1de77632a3f3c4851a302bbf170518adac4484fc SHA-256: 2e68eecaa2f7cafad90f070805b6b232d2ffca92d1cee7eeefdafbd7e0e2471e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of external links, many pointing to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The presence of a 'download button' heuristic further suggests a lure to download malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature, likely involving phishing or a trojan downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/uplcv?utm_term=earn+to+die+3+download+for+pc PDF link annotation
    • https://lecourbe.dk/userfiles/file/35904345279.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/67177088437.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/82927680998.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ac0114dc3---1455665320.pdfIn PDF document text
    • http://hotstamping.pl/files/file/28014315987.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/jifoziki.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/merumatemepaf.pdfIn PDF document text
    • http://hflchw.com/upload/file/jafigotirafuxunoxaw.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614238573dec5---xalizaf.pdfIn PDF document text
    • http://my-hustle.net/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/kafeluwebatew.pdfIn PDF document text
    • http://aviafond.ru/userfiles/file/vupudoluv.pdfIn PDF document text
    • https://jss-moms.si/upload/File/gadadevotofulaxubevij.pdfIn PDF document text
    • http://talcmanagement.com/uploaded_files/userfiles/files/gemedekabomutewofazunikez.pdfIn PDF document text
    • http://satunatc.ac.th/ckfinder/userfiles/files/sumisazuta.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b9278b7a8---lonirivefamedovubub.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130582b36036---1338920870.pdfIn PDF document text
    • https://maciejabramowicz.pl/upload/files/file/konujesavilowawosanazuzul.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a65faf3fe7---duvuxomodesijepigomok.pdfIn PDF document text
    • http://pazarziraat.com/userfiles/file/vepawekurepe.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/70476732762.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/43186653913.pdfIn PDF document text
    • http://mtegl.wsystem.sk/userfiles/files/28639584968.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f3e0cdd00---lojaz.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/16266747146.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/92757523663.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/fogivojokuzidosovates.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/telanisibuzogasi.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_off0000e743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE743 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 17844 bytes
SHA-256: b972dabf9723533f15a83b6c46c4ebff83efeedf6dcd9a5fc4caefbbcfbd5164
font_02_sfnt_off00012e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E01 10684 bytes
SHA-256: 0aaa48d519fb374bfbb18c0f8be241fec6b173c6f1125a8ee1bf014436a36f04

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