Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba469a153bc0e825…

MALICIOUS

PDF

70.1 KB Created: 2021-09-27 18:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9e6dbc74de4289ee72babfc44b419777 SHA-1: 15fbd48bf70275d026501ec33a97aeaef653dffe SHA-256: ba469a153bc0e825c9c56a3f3e60ff4d32a61d9d5aeb2ee5aa467a8b13be91f6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a likely phishing or malware distribution attempt. The document body is unreadable, but the heuristic firings strongly suggest the intent is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://archism.ru/uplcv?utm_term=red+glossy+eyes PDF link annotation
    • https://szelvedojavitasmiskolc.hu/files/files/51948920589.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/mubesugemupavoluwofekek.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/38494497399.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a806089a30cfd648e309f89710dc02f8/zebowowexamizemaganojoxal.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/piwuwuditodemiriraperi.pdfIn PDF document text
    • https://msiutilities.net/documents/zubisedafe.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/posov.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/39548871307.pdfIn PDF document text
    • https://booking-news.hkdnracing.com/webroot/editor-uploads/files/39377995786.pdfIn PDF document text
    • http://ubest.ru/images/file/4327546011.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/81101167428.pdfIn PDF document text
    • http://arsvet.ru/img/upload/datoz.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/gopikurowoger.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/bejupawupimugekile.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/residogomemol.pdfIn PDF document text
    • http://vaynhe.com/upload/files/zefokuvazoruzejuro.pdfIn PDF document text
    • https://martas.vodrsport.cz/uploads/files/57467178207.pdfIn PDF document text
    • http://twilaw.com/files/files/99783371982.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/dawukuzinizanitiwep.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/dizogovulurigupamoxoxopop.pdfIn PDF document text
    • https://vzglavniki.net/data/file/mugogofimadunipimuwowilo.pdfIn PDF document text
    • https://subded.org/userfiles/file/xiponezuxatovutuf.pdfIn PDF document text
    • http://xn--lenachatka-57b.pl/uploaded/file/zigubosub.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/163c8036ef2919de8e61746cb3ba71d9/97749333075.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/dufixobaretitig.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_off0000b28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB28E 16652 bytes
SHA-256: 6e0f6d220806c1a769ca18613d88013ac0d2b157b8952409e5cdccc1728f2aee
font_01_sfnt_off0000dcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 10028 bytes
SHA-256: 0ed3221b44b53213f8fefd277ac50a1d130b912b85950a1b96a04ce1b65a2d5f

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