Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd3e3fb1de6668b…

MALICIOUS

PDF

69.3 KB Created: 2021-09-13 00:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 89f36c0725159dcd7dc76e9231f30995 SHA-1: 3cd4040f8472c5f2d6c3d48850c21b3c9bc70d6c SHA-256: ebd3e3fb1de6668b25c45dcf0ccca13dffadface947310082dd9dc7379426818
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains an embedded JavaScript stream and numerous URLs, many of which point to compromised websites or disposable hosting, forming a link farm. The embedded JavaScript likely facilitates the execution of malicious code or redirects the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://irlanc.ru/uplcv?utm_term=gta+5+for+android+free+download+full+version PDF link annotation
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/sozosixarefalubibizu.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/xozodumojakorisej.pdfIn PDF document text
    • http://spiregene.com/image/files/20210906_111508.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/bawubibamirefero.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16134b7502891a---rebate.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/lefexotonenuvirawew.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/e5a16768fdeb3838a2c18f11f8ba1308/pifowafa.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/55175180039.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/jovuzeben.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138ec9fef55d---gaxexil.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/tevigisimewimiduwebexulu.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/pamepesikemoxip.pdfIn PDF document text
    • http://risme.vn/files/99177952463.pdfIn PDF document text
    • http://ktcz.eu/files/files/popazuxogumisuzumakamame.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210911170156728.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/zerozidolovulokosere.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210910132324.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/69363572703.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/64089126536.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/wepajevula.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c76257fc2e---44292298223.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/mijomoroligek.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/30724381027.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/38844348709.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/sorusarijebev.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_off0000b160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB160 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC972 14512 bytes
SHA-256: 7b826fcfa5bed53946eba6fbffe8dbdd8dc2e25babe8d82486759c809cdaea3c
font_02_sfnt_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 10772 bytes
SHA-256: 0e6794a6f0fcde2ed6fa48965a7137c9a3c719ea7985531570b9b098f24461dd

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