Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec01a940bed69da…

MALICIOUS

PDF

77.1 KB Created: 2021-09-08 06:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3779493e97eb79e7a423aed06f783883 SHA-1: d52bb3a0e0e185efee9222309b5f086038e1166b SHA-256: 2ec01a940bed69da2a672efcedd86c64038f3cc4612f39f966a49e4f530040c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links, many pointing to potentially compromised websites or disposable hosting, indicating a link farm or phishing attempt. The embedded URLs and the PDF structure suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://jainfarms.com/uploads/zanaxufutegetexamitup.pdf In PDF document text
    • http://whkmradio.com/userfiles/file/24198705998.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/diwovomalasofobipipijug.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210906_115951.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/74958450189.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/pap4ltmqpcutsneclmu6asitla/tepunodakujefemajixe.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e75912535---gomiwisot.pdfIn PDF document text
    • http://thedreams.cz/files/pojukitutigivekaduvu.pdfIn PDF document text
    • http://princeverma.in/uploads/files/kisafifek.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/q0o2mor2khrpivjliglfrpovf6/50042248639.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160a3907c7039b---durabulotumefin.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/momov.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/218d68e66d46abaf1c70090a42167c7c/3746589544.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/46412008754.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/27187898320.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/j2cmtpikgo0m5e1ecg22grc8e4/34446101634.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/pukomezan.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/tufurafekeleji.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff5886ecc0---95541240972.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/vinobibapafatipaxobuv.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/c03c010f8233a2ff1c5d716a8af7b087/22149948596.pdfIn PDF document text
    • http://rockhouseschool.com/rockhouse/uploads/files/gotovezawisiresos.pdfIn PDF document text
    • http://eco-building.cz/UserFiles/File/senusexavigijiga.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/3985876315.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=sirah+nabawiyah+ibnu+hisyam+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_off0000c7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEA 10880 bytes
SHA-256: 8aab504a14e0c3484dd0502b3d6ef7e16b1f055bc5a34623f14cef6290fae0e6
font_02_sfnt_off0000f899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF899 17920 bytes
SHA-256: e7cd1a17694a32dda38825c7dc725cc8311250b3a9e7472d371e85aa472d26bc

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