Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee50b139bba23deb…

MALICIOUS

PDF

73.7 KB Created: 2021-09-19 05:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68dcef6d3cc600089d4ed62eb03c6634 SHA-1: 8cb0ac4b74892338b976312b7338d79cececc880 SHA-256: ee50b139bba23deba8ca74c47794c1cb55f5533a973bd6b031fad2122d49181f
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple compromised websites and disposable hosting. The primary URL suggests a lure for downloading a 'hacked version' of a game, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=download+dream+league+hacked+version
    • http://findmecakes.com/userfiles/files/jelizokelajuwabatomulajo.pdf
    • http://gurukripapublicschool.org/userfiles/file/rozizefomumiriru.pdf
    • http://vasset.bg/userfiles/file/rabezarewujusiwefutibeb.pdf
    • https://nacionalequipamentos.com/ckeditor/uploads/files/xejotiwefumigita.pdf
    • http://saipanbooking.com/FileData/ckfinder/files/20210901_E9EFE8F926A71B90.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/baepliv4emvkemqsh1gpfeg1a6/25202934173.pdf
    • http://all4pets.cz/ckfinder/userfiles/files/lerinexitodubuzizilazuz.pdf
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/80998680691.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/tazef.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/00883de4f838b80aa9dffc2b1b08525c/29816338533.pdf
    • https://eurosan.pl/user_images/file/zezogirog.pdf
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/77726375733.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141fa9827878---wukozulolikigazefapuwatur.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c82604bc3---4042913866.pdf
    • https://securitydm.net/slicice/file/20743095376.pdf
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39481812872.pdf
    • http://phutunggiahungoto.com/uploads/files/sifiditarujafasisakitag.pdf
    • https://agape4u.org/userfiles/file/58769014527.pdf
    • https://millvalley.com/wysiwygfiles/file/guvogidawumem.pdf
    • http://longvu.vn/Images_upload/files/5326199142.pdf
    • https://eghamatkade.com/basefile/eghamatkadecom/files/62185307526.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/lojusipedamexibotizidudux.pdf
    • http://turskazka.ru/ckfinder/userfiles/files/sujawabu.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_off0000bc65.bin
6e1cd83cfe9c86ec0968d22ad86dc176009645f983655eb9928ae30d283a2e05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC65 16728 bytes
font_01_sfnt_off0000e7a3.bin
37ccc7cd04ad4a38d9ac4d94a313abf24019d50432525d8be798f9a1ad18c6b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A3 11064 bytes
font_02_sfnt_off0001010e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1010E 16792 bytes

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