Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b394431dc8ef56…

MALICIOUS

PDF

70.1 KB Created: 2021-09-27 22:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: defe8d0671b63af99cc3dde35d0b18e7 SHA-1: 60f84d1dfecf4d4177598d8e25baf7a772c8c4fa SHA-256: 99b394431dc8ef567935453c2860ddac2bab269f9b7d061abf6a4ae9dd886912
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one specifically referencing 'gardenscapes hack unlimited coins and stars', indicating a phishing or malware lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and link farm characteristics further support a malicious purpose, likely to redirect users to exploit kits or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://catamma.ru/uplcv?utm_term=gardenscapes+hack+unlimited+coins+and+stars PDF link annotation
    • http://seowonbattery.com/files/fckeditor/file/1433917371614048a3c2a69.pdfIn PDF document text
    • http://juncheng.tw/upload/files/kixume.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/5154271359.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614656e0b7fb2---nubukebonavoseka.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021092711560273499.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/najuxatusosav.pdfIn PDF document text
    • http://hyswimpool.com/userfiles/50916105732.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202109250807409356.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/jenixopurodaborepub.pdfIn PDF document text
    • http://all-premium.com/user_file/files/80063546152.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/hghncosdt4riuls5uitvrbv3q7/bovopo.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/63388455339.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/fukokumi.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/51112447117.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/68621620331.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/82552493332.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/xotizepibefidojusepiw.pdfIn PDF document text
    • http://abwessex.com/uploads/files/bamokegozanosaseluxisavok.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/1928296872.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/guxenegigakupig.pdfIn PDF document text
    • http://gradn.ru/uploades/fckeditorfile/sepod.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/pasizesanewiwibojusatu.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_off0000afdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F3 11008 bytes
SHA-256: 8da4eb3a6630b946411c2c3547bc7aedb16f265200d3207133c1fa6c6d593689
font_02_sfnt_off0000e152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE152 16140 bytes
SHA-256: c2a20e8940f83cdbe2b25e1898507785aeeaf7f7059cf7f3c8dede3aed4eb3aa

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