Malicious PDF — malware analysis report

Static analysis result for SHA-256 2208d28b5ed4092a…

MALICIOUS

PDF

78.7 KB Created: 2021-09-03 17:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4582c686f52c58128f8202945facb1fd SHA-1: 5bd2540f424c792dc6559d2fab9fd3b07514eab2 SHA-256: 2208d28b5ed4092a4209b999c1cff0312eccc0109a84df75480baef22def9511
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links, many pointing to potentially compromised CMS upload directories or disposable hosting, suggesting it's designed to lead users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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.
  • 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://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/kufuzewomesogufejusi.pdf In PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f24348605b---3114278363.pdfIn PDF document text
    • http://megalaserasia.com/upload///30345055001.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa95e79dfb6---35159669202.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/vusefifemiwup.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/13883882026.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/revewosekifefesu.pdfIn PDF document text
    • http://roletyhanarol.pl/files/file/daguzewakujiwedotuwebik.pdfIn PDF document text
    • http://kotolantopeni.cz/file/lajopodo.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/fusawuwofaro.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba82a2a9afa---gobixajosalimuzuz.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/65795686851.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/moxovijux.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/kenodukoxutatileliwulatup.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/55067126439.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d022b5c15b4124d7f22c8f371716c628/73059010500.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/56192167987.pdfIn PDF document text
    • http://hunting.kg/userfiles/file/81998794309.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/72983200107.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/bolimero.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/48893927014.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/41915998479.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/c6e679855ff83dc3546fdb79a43e046a/fenubodugisuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=codigo+civil+chileno+actualizado+2017+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB407 16376 bytes
SHA-256: 02995ff5d12d0309829ece11b5db619325ba7cdbb77bb1dde73c8317b68385bd
font_01_sfnt_off0000dd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD73 17616 bytes
SHA-256: f96a1397e9322089769f0cf7040346f4f11ada5cbb53f232f1fcf2b1c24b701a
font_02_sfnt_off0000f84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84B 11232 bytes
SHA-256: 8bbb285103af4cabd709b4303f7db2a103f7720f8544df10bf92f93c423584eb
font_03_sfnt_off00011289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11289 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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