Malicious PDF — malware analysis report

Static analysis result for SHA-256 289a202b9e5fa735…

MALICIOUS

PDF

70.7 KB Created: 2021-09-17 06:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fe6e87285f55483c0a5c5398ec85212 SHA-1: b88537e00bc45b98597df70584f301fea9cfdfc2 SHA-256: 289a202b9e5fa73587f224c5b09ea5a38e355adaa9acf8261534078d4c70d9d7
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The presence of numerous links, including those with UTM parameters, suggests an attempt to lure users to potentially malicious destinations for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7776

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://butzbacher.turnpoint.jo/app/webroot/upload/files/firab.pdf
    • https://adepotcustom.com/UploadFiles/file/20210909123724183.pdf
    • https://briljant-maleri.se/UserFiles/files/42663213726.pdf
    • http://ffarchitettura.it/userfiles/files/zaruredazunugape.pdf
    • http://tce.vn/imagesflashupload/file/sofebine.pdf
    • https://mudraconsultancy.com/uploads/files/gabejamopirudovipunaj.pdf
    • https://perfecthospital.net/FCKeditor/file/52583986379.pdf
    • https://hankilfood.com/upfile/files/nekulemadewupelite.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16130847725364---xabarezefeniludob.pdf
    • https://yingzhaoliuart.com/upload/file/46037197512.pdf
    • http://rothemtour.com/FileData/ckfinder/files/20210906_798447564DA3BE25.pdf
    • http://smalternatywa.pl/media/upload/files/3bd14219a8fc67b4e44e6a502c26a00d.pdf
    • http://silarperu.com/UserFiles/file/tasumimuzitafigedefobu.pdf
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/xolifuxavigapipajanebofa.pdf
    • https://motoralbini.it/files/file/54025687156.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4f8508b8b---zikivuzebatuvuninir.pdf
    • http://nbmounts.com/userfiles/file/1630677491.pdf
    • http://secoinblock.com/upload/files/gamukitekuno.pdf
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/nutax.pdf
    • http://qlinairnv.be/userfiles/file/24805932483.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/4735607ad6a50e80339a272c2c8ef672/bepogopoxegam.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=can+i+control+firestick+with+my+phone
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2cd.bin
712c05a7a2207b72e004985dbe32f50ced39c4e9f41a2bc358c5d7b1f6a5e7c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CD 17884 bytes

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