Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c233ae7f161f5e…

MALICIOUS

PDF

67.9 KB Created: 2021-08-30 12:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 81ced04a0dc47e88e8f2ed05a255d9bf SHA-1: 8083aca481cb789fb1ff6a316b25dcf83b04e8a8 SHA-256: 62c233ae7f161f5e6d9bc63ec90196c418abab4fa6c93dd1d1400fbfab24365c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity, likely aiming to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8567

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://oniceh.ru/uplcv?utm_term=shadow+fight+2+hacked+apk PDF link annotation
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/69c299c2b55d8a9299e7dfe39cbf433b/jilivasubagudakafigi.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/3b729731ec4251084da4d3dd5aae09a4/55979174130.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/gipesugi.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210530081542.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/t3sl4kbr1hg9mbt2rrqflpk3v0/52807209447.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070cc196e4c9---61901492813.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/vudilefejopatonusupok.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/6komuq8jbeo589pli8apkp44mr/xoxodonorudijaniju.pdfIn PDF document text
    • http://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/didowakasowelen.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/37326058135.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/b32c725e8a94bbbdf3d0b3ab9b3911ec/jesuzifakoxafusivoxogotuv.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/b2dc80a2f56cfea68d1cc34301fe57bd/melaxitubulujaveg.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe935176da---vojuxe.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae933206f78---pijiwajulesunavosoli.pdfIn PDF document text
    • http://balone.net/_upload/file///84793827366.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/dokolovagodase.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e31415f82---37280297258.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/loketidevo.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/dokotajefiwixura.pdfIn PDF document text
    • http://www.motorradfreunde-toggenburg.ch/up/files/77396814244.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714412e2c1b---57345149815.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/99997211834.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/16575440878.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/19/file/20210519_124412_114.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/160935c86af78d---82388954884.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAE 17304 bytes
SHA-256: 911ef464ad27164a5274d172eb5ca8cd35c8d1dc5f3699fa53da5930cd2cb9c5