Malicious PDF — malware analysis report

Static analysis result for SHA-256 458f245d44125f43…

MALICIOUS

PDF

86.1 KB Created: 2021-06-29 01:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 043ae62089d7b26708455aedb146ba31 SHA-1: a8f22d4ac530d5e388f0489bcfdc3a20cf604938 SHA-256: 458f245d44125f432d1aff54d91b1f38551c1ef3a252a39c20954456b82cc40c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites, including WordPress uploads and disposable hosting. The primary purpose appears to be directing users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://drafthe.ru/uplcv?utm_term=r+diagrammer+examples PDF link annotation
    • http://arohitourandtravels.com/userfiles/file/nefakepavageduvasadap.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/55059966007.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d01eb7dc86---wenefilasuteviwelomimugot.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/3ada7abaa55f2e96143443efa4dc5ad0/dopomevepudija.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/44156058668.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6d47dbd69---33654784448.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/zexorokijoxeralom.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/28a07ee33218e18834dce7ca5ea2041c/21148722123.pdfIn PDF document text
    • https://x-software.cz/data/file/82008314439.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af37234a0e0---butabuxebodok.pdfIn PDF document text
    • https://luminex.pl/upload/file/varuzaguwebarilaxuginatod.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/b8ete7hv76dmeu0lgoeruobkl1/67248865055.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/93651698800.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/simitorixa.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/10023646515.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f430a134c3---55496982628.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/9258f09292fd017b17630e87363867d8/vupegugakufugogiwuxi.pdfIn PDF document text
    • https://subarini.ro/mm/file/budoxisuluvesil.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2d608bac4---mezogimekaw.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609278664ce45---jililav.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099d7020fdfe---damifugelebixewumub.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/pidiwetap.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/10058955121.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/fnc6i34jak0nqokgte4dllbab2/sekisog.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEE 10560 bytes
SHA-256: 6dcf542e33caf0ed32a43038a8bba49bc77d25bb0b6748c57174bd934fd0873a
font_01_sfnt_off000104c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C1 17720 bytes
SHA-256: 20f061645118101fd3dec9f7fcfc4438e66ddce8ceb35ae33be522c99715cc23
font_02_sfnt_off00013308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13308 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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