Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c18f7109999bc7…

MALICIOUS

PDF

86.7 KB Created: 2021-09-13 21:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d5b3bda91668a0f5256377442b879724 SHA-1: c31b4a409342b98e52a123b428cb6b48bd0067c4 SHA-256: 77c18f7109999bc7e0b6792be8a5f02a46f92943d90b13e1b937a09f8037350b
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 5

  • 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.
  • 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://chcial.ru/uplcv?utm_term=apk+music+studio PDF link annotation
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/72388683015.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/bewebaluvuwidu.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210909192139.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/goriloforesidiwoteba.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16138a8dac0a07---17205118365.pdfIn PDF document text
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/nedepumagefav.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/72104055582.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/8838507786136404b52e7e.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/pamabaduwipavi.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/39373351967.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/46258202878.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e85c133542---jarilopanizu.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/80613924131.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/bulisilofodapewob.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/powigumogadiregekexetiw.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/52615434918.pdfIn PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/14267693323.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/21958407293.pdfIn PDF document text
    • http://solentpodiatry.com/jackvl940/web/content/images_uploaded/file/zipojoruvudazatotuketak.pdfIn PDF document text
    • https://mimpiindah1.com/contents/files/31711423776.pdfIn PDF document text
    • http://massiimo.com/piceditor/file/56337052818.pdfIn PDF document text
    • https://kaisar168.com/contents/files/3358918085.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///11429914391.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/folefomazomo.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/26326934333.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/vazinoxuvesot.pdfIn PDF document text
    • http://vrakskodamnetice.cz/file/93783996952.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_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A2 17616 bytes
SHA-256: 03509ba89babe21680e02c6ca7c713cea614b2c867f5f1eaf7d421c5e38a7e0f
font_02_sfnt_off000135d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D4 10304 bytes
SHA-256: b692768b50874603764cb2f2e3df5f134590b54c9da667117daaef322781a663

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