Malicious PDF — malware analysis report

Static analysis result for SHA-256 52784b9f8039b55c…

MALICIOUS

PDF

86.0 KB Created: 2021-09-13 21:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6abf30edacacd2373ea21c4ac0a834d SHA-1: 28c9143b21735084689f396e83e1c470b0c185c0 SHA-256: 52784b9f8039b55c0f7e63642de93b3a1576606c512450806fe10c33c954f71e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to PDF files on various domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates these links are likely part of a deceptive scheme to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://dbmotorbrokers.com/userfiles/file/filikomati.pdf
    • http://gonvvama.net/filespath/files/20210904062420.pdf
    • http://gojjang.com/uploads/files/wefij.pdf
    • http://mikomisushiwc.com/uploads/files/48231210524.pdf
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/56152729459.pdf
    • https://pmapmc.com/userfiles/image/files/15142888039.pdf
    • http://homestationrealty.com/userfiles/files/zokitugupuzanelo.pdf
    • https://airbays.com/userfiles/file/xafamirotatujikej.pdf
    • http://tunecharts.com/userfiles/file/53231728072.pdf
    • https://www.iieng.org/editor/ckfinder/userfiles/files/savewejavunobotimetavuvaj.pdf
    • http://skrabl.pl/www/rpbd/fck/file/runalisajemuf.pdf
    • http://getsolarnj.com/userfiles/file/71624215103.pdf
    • http://wccflooring.com/userfiles/files/89109601040.pdf
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/laxutowufumurifituna.pdf
    • http://dentalcenterstudio.it/userfiles/files/kusupupidugimaz.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f86408fb4---xozaparikini.pdf
    • http://www.terresdescaraibes.fr/file/japikazileb.pdf
    • https://himalmanpower.com/ckfinder/userfiles/files/72269454380.pdf
    • https://taipeitccia.org/CKEdit/upload/files/tolozanifoxorovurosata.pdf
    • http://berallebags.com/UploadFiles/FCKeditor/20210909130138.pdf
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/43380527592.pdf
    • http://stroykap.com/application/views/stroykap/userfiles/file/luzorabe.pdf
    • http://fishngrill.iorderfoods.com/uploads/files/didimujubi.pdf
    • http://paulgraphics.paulsfashion.in/files/9034362557.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=the+brief+history+of+time+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 16792 bytes
font_01_sfnt_off000103c4.bin
ebcc222878176cf882e532782dd96982bd592d5ea22c432609fb44e41274ca48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103C4 10668 bytes
font_02_sfnt_off00011c09.bin
6dd840856cf6b32c437f9d78f5c56c5a59c83beb6c19c64e3f0badce701f9f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C09 17924 bytes

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