Malicious PDF — malware analysis report

Static analysis result for SHA-256 32659ed206cd85dd…

MALICIOUS

PDF

87.2 KB Created: 2021-09-06 08:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b2fabc516ec968d1d3ef04eb414df658 SHA-1: 7a4c76a749c42a9e0c787303bf949bb39620db7c SHA-256: 32659ed206cd85ddf132f97ea4edce5f28107e491d1ff1cb41ccdff79ca16982
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1204.002 User Execution: Malicious File

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The heuristics indicate it contains a link farm pointing to compromised WordPress uploads and potentially lures users with a remote support tool pretext. The document's structure and embedded URLs suggest an attempt to trick the user into downloading a malicious file or engaging with a remote support tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://roweryelectra.eu/app/webroot/uploads/file/16286868120834.pdf In PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/8892908343.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/xubepo.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/d1d77b928c9e34a6f07371260c1ada01/ketazidoxar.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c067e5d6502---dolemilezapape.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983a3f4db96---84591686451.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/17904846956.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/setovobekopabevev.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/9plt9kj0r60286p4r6pn96u1s7/goluruzixosiseneta.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/lovijobasujuw.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/baxatimigo.pdfIn PDF document text
    • https://avenue102.com/uploads/file/78668544640.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/55857017541.pdfIn PDF document text
    • http://mq-water.net/upload/kajutogutexoxujevenot.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/kexosagixiwawibu.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/455575c6aaff3eb2699b9b414990b67c/85288684611.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081fc7b82752---xirowixofekapibo.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/59578274970.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/52920510492.pdfIn PDF document text
    • http://jonesfamilygathering.com/clients/2/28/28a2af4908f4fae7f70f8b91082c1e08/File/80463162158.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/toteliviw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=passion+planner+budget+pdfPDF 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_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 10916 bytes
SHA-256: 6bf545fce815daa69c54d0dece980a6a8c5e47ffdaff907c66c31eac7b71728a
font_01_sfnt_off0001086d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001207f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207F 17664 bytes
SHA-256: b6582fe06c8d2706c565030716d909f84374cafb219b8c9aaf8e1b1a72e5f1a7

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