Malicious PDF — malware analysis report

Static analysis result for SHA-256 187bb54ea2d772e7…

MALICIOUS

PDF

76.6 KB Created: 2021-09-05 13:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3d14accdd02a0970ed024015bc1e904b SHA-1: 84934582cfc5a8a2c04c15c0bedd5ba9a5fa67af SHA-256: 187bb54ea2d772e7769312bf6e7d03c29a5eef1a34def99e8a01779ad2f08c36
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. The numerous external URIs, many pointing to compromised CMS upload directories or disposable hosting, suggest a link farm designed to obscure the ultimate destination, likely a phishing page or malware download site. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://holidayinntorino.com/userfiles/files/47415720140.pdf In PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/3bulpbn3gr7rqpcvqukkj3sf74/zexon.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/23e2066ed676232a78140513173c41c5/wixatekorimuvibef.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/455783630.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/b8fb2bb86516c3df950ca542221da447/xedagugeri.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5fa370987.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879b9bebe83---zumoxovetedilejimoxisa.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/13891359453.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/11449654679.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/lanovezijitalufakigokakoz.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/i2p75h3tsd8pnk9lpar4j7q61a/29369871275.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/76300402314.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/v7hvocr8u0lokfgsv5m48k6pg2/31293003286.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/15726762559.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/216916ae7e569390ddc7ec72ca406ca8/42166972496.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/35361192359.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/mivugodanokugenafabopeso.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c76461e51d---mofavosadolowevumedupomub.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/237f87377525e29ecd0126ff08f72998/funika.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc71a7fe0b---motakule.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/dd5c3c36adac114e01861d57e6b22685/87650996901.pdfIn PDF document text
    • http://acril.ru/ufiles/files/konojokonanelori.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608024c371d7f---48151001922.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/vadawazovufaxuw.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/1ec95f807b11a81b91de86872a8e64d2/29168539873.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/xamovege.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d40e25a54ae---dalozo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=tectonic+plates+worksheet+ks3PDF 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_off0000c662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC662 17596 bytes
SHA-256: 3b1dde1c74466b49463e7fd40a67bba9304c2f746e3bcb7a99a492f758d20412
font_01_sfnt_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C28 10784 bytes
SHA-256: d60d2495cfb6b32fe0feb3556febbe417920dc96e3a8c8370a81770b8847347d

Open this report in the interactive analyzer, or submit your own file for analysis.