Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2491c6aa6d862c…

MALICIOUS

PDF

72.0 KB Created: 2021-09-18 03:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0c7545ced5439fdce57b6620269dfe7b SHA-1: 772f911ed9f265521a64bd90f726033608a915ce SHA-256: ea2491c6aa6d862c8866d35e1e950302ca1e2469c1a461995752fe90d9c6263b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on compromised CMS upload directories and disposable hosting, with one URL explicitly mentioning a game download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests a lure to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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.
  • 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 https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131fd18aa826---salusawiwa.pdf In PDF document text
    • http://kerekagy.hu/UserFiles/file/piravodoviketetakomuve.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/93372476392.pdfIn PDF document text
    • http://solo-reisen.com/media/images/file/rezuji.pdfIn PDF document text
    • https://ustunbilgisayar.com/userfiles/files/zokipegejovorajunega.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/temavunurasibota.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/vajaruvadaxiwufijevusugo.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/35687623820.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/lorepexusapoba.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/38b07faec2d4aff0051418fa00c7c76c/73952753600.pdfIn PDF document text
    • http://glassick.com/userfiles/file/97582470344.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb62deee34---jekufilupixozokajuvan.pdfIn PDF document text
    • http://spreewaldpension-luebben.de/meineBilderAlbertGrundschule/file/gibite.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/75962660742.pdfIn PDF document text
    • http://ptsound.com/plugins/ckfinder/userfiles/files/rukefuketule.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/73629056717.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/4652812366.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/doked.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/jelunefelakimemu.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/34928586736.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/decf6b86b4d4edd590c9bb21e6fd871a/pulunekafuviporemofudif.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/14a8efa49de6946e812647b45eafad98/kojafosi.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/xafimeze.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/59270518110.pdfIn PDF document text
    • https://onlinendttraining.com/files/54651094092.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/71705116741.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=prince+of+persia+3d+game+download+for+pcPDF 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_off0000b6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D4 11124 bytes
SHA-256: fde6854d2f13e456a57bd31b5010c34d9446370f278240e2b9fd5c30535114c7
font_01_sfnt_off0000d095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD095 16336 bytes
SHA-256: 6ae2feb6a12050c7e3b8b8b49b92ee83ec0c093b62b585d8c639f4f6fbf9e6bf
font_02_sfnt_off0000fa20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1