Malicious PDF — malware analysis report

Static analysis result for SHA-256 61140092b4c5773f…

MALICIOUS

PDF

76.8 KB Created: 2021-09-10 06:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6a10c468c92dc0a7b5aed417662bfabd SHA-1: 3d6f9e3ad90c51003843176973b874664e3e30d7 SHA-256: 61140092b4c5773fe81139a08855a5ce07ebe3aa3ab1d5a135e0500b737ef42f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous unknown URLs suggest that this PDF is part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://location-appartement-venise.com/italie_documents/files/jipewobife.pdf In PDF document text
    • http://speckrepeg.by/UserFiles/files/47328930289.pdfIn PDF document text
    • http://artbaget.net/admin/ckfinder/userfiles/files/49699157505.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/gavivu.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613343a475e09---mupemobe.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/zuwulenibodotujezolojibe.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/86113182536.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/23298784384.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/resimos.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/tibijiwa.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vowodidizom.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/satilisirowo.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/jotafeboninalak.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/duwefokevulaz.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/votugomijotuvem.pdfIn PDF document text
    • http://airmon.hu/images/files/xumomememugutetaleg.pdfIn PDF document text
    • https://davnosti.ru/upload/nazudorekomebebepamaz.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210907020038.pdfIn PDF document text
    • http://votejoedestefano.com/editorData/file/4895841849.pdfIn PDF document text
    • https://hometutorsdelhi.com/userfiles/files/kesazakub.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/45225801950.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/c85cd4bde77562fa2c5c43754dba20ea/kirutibumutuxuj.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/53779952714.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/74036688694.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=zlatan+new+songPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elementIn 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_off0000cc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC73 10140 bytes
SHA-256: 01f91edf61766ec1d558e75656e45db4ebf972a84732a7d69986551766014b8d
font_01_sfnt_off0000e360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 18888 bytes
SHA-256: de44b4e4fd05f43d0ceafcddf42eb7738fd6331fc743929c0742192431e17737
font_02_sfnt_off00011428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11428 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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