Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0dc401dfae1522…

MALICIOUS

PDF

80.3 KB Created: 2021-09-22 17:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3329e2f47298dc5c3c36a723e4c2c482 SHA-1: 0105cb1f16af13c0dcabdce4a8f6cfbde24f0c95 SHA-256: ee0dc401dfae152228ee9b38c15f0efeb85aad09d988a93457fbd27a52abe765
134 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure to download additional malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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 http://luchetti.it/userfiles/files/vusobi.pdf In PDF document text
    • http://phongthuydotho.vn/upload/files/96293047502.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/77226646742.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/61782827988.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/74224560621.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210914/1753399408.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e48cab137d9c959e81cf247cdac2895f/40759533014.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/10927252179.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ve943rc74622mbhnq5qdaol397/buxofa.pdfIn PDF document text
    • http://tiyuchangdi.com/upload_files/files/20210902_141917.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/jopewelapemewazuxipatibu.pdfIn PDF document text
    • http://bakoca.hu/files/file/nuwomamogevenobirowan.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/48962890214.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/zojof.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/padog.pdfIn PDF document text
    • http://nfc.soo.jp/file/48659960656.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/ramuzikagemazejinod.pdfIn PDF document text
    • https://euroialinsol.ro/userfiles/file/pexotoxoragaxubamipiwo.pdfIn PDF document text
    • https://rajaunited.com/contents/files/dewoximadagajokiditilab.pdfIn PDF document text
    • https://petribax.com/userfiles/file/nafaviwasererigokapesulel.pdfIn PDF document text
    • http://hklh.vip/data/attachment/file/zoxuzerexupalizu.pdfIn PDF document text
    • http://www.somdattabasu.com/fckimages/file/55338429837.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/64682096307.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=killer+escape+unblockedPDF 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_off0000d622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD622 10732 bytes
SHA-256: d20fd0c860d704106cc38c5ce9bb5027aaf94ec9079c5a29ffeb296633fb184f
font_01_sfnt_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 17260 bytes
SHA-256: 65323c78315b156d2097b069e4eef4278ec5dd3bf5c72d93422671e58973aafa
font_02_sfnt_off00011bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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