Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0359310d09f11fc…

MALICIOUS

PDF

90.1 KB Created: 2021-07-05 03:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ddb07304a6703904928dfd46ac30d049 SHA-1: 7662ceb3bf435ed6ed9deabafe71cebdfcf87220 SHA-256: e0359310d09f11fcbfda839e318e362002ace45d0589ef419069f13b5d548013
156 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 contains numerous links pointing to compromised WordPress sites, specifically leveraging the 'super-forms' and 'formcraft' plugins for file uploads. These links likely serve as a distribution point for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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
  • 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 https://oniceh.ru/uplcv?utm_term=project+x+sonic+porn+game
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/9tf33o49g28im4rt07khriafn2/nutivodin.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c04ecfa2b78---17082822661.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9d611a295---dujajusiwumoja.pdf
    • http://designpavelzapletal.cz/files/file/7685432647.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095defa63ed3---nekosuzimuwuvis.pdf
    • http://angelcabrera.com/FCKfiles/file/20401751288.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c9850c3ae---35024672376.pdf
    • https://audit-advisers.com/userfiles/file/xipifajapibadura.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/bad3dba02529af48b9054b3900ef90f3/tomodikakogomowiwo.pdf
    • http://614move.com/clients/4890/File/lepubinadamopimefori.pdf
    • http://esipro.fr/userfiles/file/vebolowupefajesato.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e1ac937f71f---bezugatagebuz.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a43fadaa1c0---5953769028.pdf
    • http://osoboebludo.com/ckfinder/userfiles/files/tajogetig.pdf
    • http://xsteelstock.com/d/files/depakikeg.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/e37984da5918593aa0f2032b59aa6f34/tikowo.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cac1df0ee---2347268741.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927bc879bee---sulesatogadan.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/60eb461ffd55f78c7d346dff3a250799/zovana.pdf
    • http://nakatka.com/files/file/57813686035.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/89rj2o78ob1kerslednpl22aa7/67020122586.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc52f543ba---98786160814.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160adcd23a85a2---dirazomituvu.pdf
    • http://brmxn.com/userfiles/file/20210520021730_vntwx0.pdf
    • http://www.asslar.de/downloads/56031096898.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bab774627d2---tuvesosesuxoxesilo.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ed10c294a---96347186309.pdf
    • 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_off0000fbf9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF9 16792 bytes
font_01_sfnt_off0001140b.bin
663811a6cbd74186ed11bb5da000f751afa78dbb1b9efc3ce76961e1ef301493
pdf-font-stream PDF embedded font (sfnt) at offset 0x1140B 17516 bytes
font_02_sfnt_off000141f1.bin
11dedbc4769ab776c66cdcbb5385568def3c790554d009ff837dd700afa4fb3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x141F1 10904 bytes