Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de222c52a2f2a89…

MALICIOUS

PDF

92.0 KB Created: 2021-07-14 04:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1436360c4135f158ddff5b553d974c9 SHA-1: 014fa130012de410e0ec96873dd907151d4d8c35 SHA-256: 4de222c52a2f2a892067771db7737578370d9e6f2cac749a2a8255c9c8c53e26
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and link farm nature are consistent with techniques used to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://dui-antidote.net/images/userfiles/file/99604991329.pdf
    • http://afgventuregroup.com/cfiles/file/maxediwevuzad.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c185be490a5---36663087719.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caad896e593---pomarejevonigunugepasimon.pdf
    • https://amitadevnani.com/userfiles/file/vojipuneriri.pdf
    • http://dinskayarealty.ru/media/file/nadareporezezepo.pdf
    • http://classicalgardenornaments.com/uplds/file/65924961694.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608173c749b19---38061814889.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b80691e240---nuxutarowagufogipun.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/8aabcdbd936d6b47d7b72550b8771802/wikemenoxizuzogigemo.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/313d5f6966f2093c445271bbd3cf7ccc/13763963062.pdf
    • https://datawire.gr/files/files/pamit.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/4airff3to41n6lkv9laajobk8f/pumitogiputipuluzoz.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aecd3e10c7---68703519078.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef86e25b2a---bizozukuvavivasalososibag.pdf
    • https://e-uchebnici.com/img/file/tuxaz.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/fgl0lpfnve08bjpeokkvbjuqu5/vuduletagix.pdf
    • http://sacmacbook.net/userfiles/file/veluvelomodajiresatube.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f9b6208cad3d59772c5d3149a2d0a507/zetovodonuw.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fc6e5cd56---ronuvilawiw.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/ta4fknrl9ptpc3q3accb4hkt2j/xovefozabubomumusabawuj.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0c68b346a---jodoxalijopedi.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/232216209260aa9a2c581779cd41be39/pasujuxeludafone.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c7aa6207910---sadowovotudesekakejubowi.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4537cae62---kibunatavano.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607200b3d3637---xenofivexibozavida.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=conics+project+examples+with+equations
    • 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_off00010309.bin
38204758ca8ba180130b495c83be2f60d60cc08bbe4eb56f47e5b3571ea097af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 11232 bytes
font_01_sfnt_off00011d3c.bin
e2661a82d926b6df748232aadaba693250184af2ca62a1b7a5e671876b40fe59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3C 17212 bytes
font_02_sfnt_off00014a85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A85 16792 bytes

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