Malicious PDF — malware analysis report

Static analysis result for SHA-256 7460a89d14befe9f…

MALICIOUS

PDF

85.7 KB Created: 2021-09-16 15:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2a2c0f285c631165e0756940f258b98 SHA-1: 1dbab4ee99bdb2287ff7f0e4c5db2891d5f0c87b SHA-256: 7460a89d14befe9f12403afb6fb2c41313dec09d29f28486a3b2e466ccf94978
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. The sample also exhibits characteristics of a link farm, with numerous external URIs pointing to various domains, likely intended to obscure the ultimate destination or to host secondary payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://matsusushionline.com/uploads/files/97610438217.pdf
    • http://gostinica-domodedovo.ru/files/wegenewedadobozumisip.pdf
    • https://bluetact.com/locktactyuma/userfiles/file/dagudul.pdf
    • https://ferropula.hr/files/kurivawi.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161415018b41ac---35319278180.pdf
    • http://abwingsmd.com/uploads/files/89193486148.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7765ff04a85b46b6136fe821164f8555/dodewug.pdf
    • http://mislenyiallatorvos.hu/userfiles/file/jetejemuluze.pdf
    • https://simplehome.ro/ckfinder/userfiles/files/jadibatozejimofug.pdf
    • https://ww150005.linebot.net/upfile/files/20210914160511.pdf
    • http://jorkurojus.com/userfiles/file/lexewanimen.pdf
    • https://ymy-tea.tw/upload/files/xuxojoxekaruxexuwimoxi.pdf
    • https://tspinstruments.com/cache/fck_files/file/bigutudu.pdf
    • https://dbhattacharjee.com/ckfinder/userfiles/files/13486332096.pdf
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/duvax.pdf
    • http://quimis.org/js/ckfinder/userfiles/files/53454876895.pdf
    • http://xn--49s538bo8ux8c.net/userfiles/file/tirobalokazisa.pdf
    • http://telecycling.org/files/file/12917193711.pdf
    • https://birutelorasin.com/contents/files/zevaduku.pdf
    • https://kurtoglumob.com/upload/file/gubatafenenixer.pdf
    • http://www.hon-ro.hu/userfiles/files/64691818735.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+add+picture+on+instagram+story+android
    • 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_off0000e87c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE87C 16792 bytes
font_01_sfnt_off00010093.bin
690f254a5c3b468169d9ae1a75b3a527502717fba5e00ac66ff2daabf8f2b62b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10093 11100 bytes
font_02_sfnt_off00011a50.bin
a94dfab6223d833fb62eca4d57538f15913fbae6992ad6639eaaf1b72f5bcf74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A50 18368 bytes

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