Malicious PDF — malware analysis report

Static analysis result for SHA-256 e077bdabed6a8126…

MALICIOUS

PDF

67.8 KB Created: 2021-09-20 00:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4bcaeee43db258dc3f1fae6c6cd5b7fc SHA-1: 9e93a56558f54ef01ea1c01a9496b0ecb1d62999 SHA-256: e077bdabed6a81260fe9308220ada5d973428bd3cab2e9f227762bf6a6546821
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ketchas.ru/uplcv?utm_term=biohazard+4+apk PDF link annotation
    • https://fontaine-eva.fr/userfiles/files/61605017881.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/perideli.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/53304886114.pdfIn PDF document text
    • https://palet-school.com/files/files/wuluni.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/wabapi.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/75944774673.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/60320562196.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/37261564946.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/gibofiwolisomasika.pdfIn PDF document text
    • https://ivanamihic.com/files/vadifitalizutajozagotuz.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/detesabelilon.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/kuzikizulasowiwuzila.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/votubisabikerupopirorij.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/84781971400.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/33102115103.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1613e02380b36a---jopodiwanoravifedojisiv.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/figenifevobexeperigupazo.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109020553021572.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/34064347717.pdfIn PDF document text
    • http://licausi.it/userfiles/files/sivev.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/komadimisutiti.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16138b6344aa3c---lulomumubabisu.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/desagosowazarukisivuge.pdfIn PDF document text
    • http://cocoal.com/uploads/file/82257876042.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_off0000ae69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC680 10224 bytes
SHA-256: f1cbc6eb732b2c9db4e2649b622432438f10edcb8b152f8a8c61a9e0b63555fe
font_02_sfnt_off0000dd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9D 14500 bytes
SHA-256: 1dae95f4495327809a49359e9c25dd26a77cea18381afda0352772477a5b493d

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