Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58281e9e8e7a258…

MALICIOUS

PDF

84.0 KB Created: 2021-08-08 21:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5cb14c09324199f48ceb2823c8f56852 SHA-1: 49e6d01cced4c0a58880a3c1b5c69f7a5fbed5f4 SHA-256: e58281e9e8e7a258d119fec6d074f7b310a16c6cd4f9856fc8cc732d4b5ebf20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, directing users to numerous compromised websites and disposable hosting domains, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users by redirecting them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=how+to+set+chimes+on+howard+miller+grandfather+clock PDF link annotation
    • http://nyett.hk/uploads/news/files/43514144066.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/4bufhndsnm0r9hqm603irn8qd7/57761947640.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609486da759f0---mazowuzojuwugum.pdfIn PDF document text
    • http://mextro.de/upload/files/fifitifuvupevelepaso.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/25995593670.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c706462ca81---26783418410.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/geganuwosiboraliri.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32e6c7dba---39377397634.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/5a64adb10dc00a16eb8d9f0fbeb661b3/514718351.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/nanatuduvovufavapipodi.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/87361142535.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/81712829207.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/dfc676f1050e841395a15f86e45542be/rexovike.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/beravo.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/59418974355.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/negofuvusasajudugel.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/sesebijizagudemepuvuliva.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079ce035a8f9---21523792564.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4801b1f209.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/56937441792.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9a5745552---47227935845.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070dce947a68---suxotapirebimujebagufapu.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/52231590781.pdfIn PDF document text
    • http://medlab.webd.pl/upload/file/27582690785.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_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 16684 bytes
SHA-256: cc4ba310deec16bc544b05920ac3a3b800790dca0cb46fbc54eb1b119247c007
font_01_sfnt_off00010ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12814 11092 bytes
SHA-256: c5d75848214fadfb6b883978dcd4910953bee289acded92b910c83d267ad0581

Open this report in the interactive analyzer, or submit your own file for analysis.