Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c2a6304c22e70b…

MALICIOUS

PDF

69.8 KB Created: 2021-09-28 11:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 01ac30cfcbbe95fdeb870e8dba16433d SHA-1: fb128af45a1d0dcb742bf8216d5f717eee2c59fc SHA-256: e6c2a6304c22e70bf51bb60247386ec31f8845fb74281dabc98463bbd5257eb7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as a link farm, suggesting an attempt to distribute malicious content or phish for information. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://konberdbio.com/upload/files/mozinaxizoligefexexi.pdf In PDF document text
    • http://france-ex.com/images/blog/file/woxaluvazi.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/196401fedd039e918eed87fa4bace89c/62525386768.pdfIn PDF document text
    • http://sfipl.in/userfiles/file/96095514955.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///tokuwajujanusetavabiza.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/17799636234.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/nebagujolejexu.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/10601929104.pdfIn PDF document text
    • https://lotteppta.net/beta/assets/file/wefoluk.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/99545088394.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/696368424.pdfIn PDF document text
    • https://kaparatt.com/images/File/51030195214.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/wesuvojozijetuvedozejexez.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/69667334384.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/74588355295.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/05/58458501732.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/xobavawenije.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/gizarin.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/68089950233.pdfIn PDF document text
    • https://acerocorte.centralcms.cloud/galeria/files/vatumesenogivubelonal.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/vavobubaxawuvorinogulip.pdfIn PDF document text
    • https://weingut-suppan.at/files/15460054666.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/32419232922.pdfIn PDF document text
    • http://thesprotia.gr/uploads/file/75926504319.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210904124758872.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+synchronize+outlook+calendar+with+android+phonePDF 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_off0000b2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FF 11052 bytes
SHA-256: 10c8925ccbf06dc0976905d836852802a9ce1fa9e3cd51c69105b013a678fa79
font_01_sfnt_off0000ccb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB7 14424 bytes
SHA-256: 78044103db267793cffadfb3e74affa5da9e55ed7dd0104b73bb3c098ec88ad5
font_02_sfnt_off0000f0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1