Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fb33654b40ece2…

MALICIOUS

PDF

69.2 KB Created: 2021-07-08 03:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f9f3a522060b1dbb0126db6ad25bc125 SHA-1: a8b64194353cf0d908e92f802a6c57f9754bb681 SHA-256: 10fb33654b40ece2a4280a3aef58091fcd3009cab1c4a6533bb6e7f37bdf1f6f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of links pointing to compromised CMS upload directories and disposable hosting, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5771

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/09earks2dklaf58pqg6td9ge32/dawepera.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/a6dc3171b44461b314942a50d73a927f/5706451678.pdf
    • http://anhbanglaw.com/userfiles/file/sotagomujupofededupi.pdf
    • http://surmounttravel.com/userfiles/files/66473242791.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/28667272980.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16082f1c517a9e---81060939333.pdf
    • https://espaciocultivarte.com/ckfinder/userfiles/files/mebizugevu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4625818b53---fojofi.pdf
    • http://lube-stc.com/ckfinder/userfiles/files/61798498224.pdf
    • https://canionglobal.com/FCKeditor/file/saxopajozapurosow.pdf
    • http://poetryforthespirit.com/clients/872464/File/wetexokavenaregisalezifap.pdf
    • http://pixel-pro.ru/upload/file/buvomowupux.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2ae047869---zenedugumasane.pdf
    • http://bloomx.com/sites/all/sites/bloomx.com/files/datagofa.pdf
    • http://asja-doll.ru/userfiles/file/damidemepumopogifa.pdf
    • http://soflocops.com/clients/67403/File/88089017089.pdf
    • http://ztkammer.at/uploads/file/lerunesuwomatiwu.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/mjarerftanb91iejggopjqlnb3/nironawemenugepoxufalo.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608928c38a08a---danoj.pdf
    • http://nena-artspace.com/ckfinder/userfiles/files/sovog.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec9c55eaff---3047825961.pdf
    • http://gibkrakow.pl/uploads/files/fedekusuputuzefedojogoga.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16092b7c2b932a---norefed.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/9aeag4pmps65nn249gu304p0k2/5000580403.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=luke+combs+beautiful+crazy+mp3+download
    • 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_off0000bbbc.bin
05499065c3e99a6ce86ece6cf94a77133dbaa275b4a70d5ad83f41ded3e22666
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBBC 11504 bytes
font_01_sfnt_off0000d6ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6ED 16792 bytes
font_02_sfnt_off0000eeff.bin
9986aed5371dac9d3444d550b2e16eca9fe80d6e598d83d5eff0f7b73b100b85
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFF 17052 bytes