Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f75669495ea299…

MALICIOUS

PDF

78.5 KB Created: 2021-06-17 21:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d8a7e0247b202982344affc1b245f4bb SHA-1: cb1b6625f6db7510529fc4acfc2048a259edbabf SHA-256: 30f75669495ea299016c76d30ab9b67bbad76c6e1103ca1029fa2d72c22b9a08
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which appear to be compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=online+games+subway+surfers+play PDF link annotation
    • http://al-bandak.com/userfiles/file/rixenotatuvekamegowebebo.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16070f1e9b5576---44738149853.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/zovekatadikoralitefizok.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/63062271631.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16096e2ec590c0---14939214393.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/67148c821945261ded2f39cefc66c140/xudulozojitediv.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/95e6104ka3ep36htet1lvkdpf2/61668641933.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4639ae0b4---75741262925.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3e380e3f1a59aeafd8958d7a996aee57/natevadidokesitebo.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/gdevf9q4apniodnq8et4nfrbsb/relojekuluwekapatobo.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ddf30e8a0---zusozipezop.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/gp42icrm2un7gr5k06g6h0bbgs/xelalupomobafabedu.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe98837c12---xafiseve.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/gemamosadidepox.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/46861569705.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160748dbf3e1a8---34440290321.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/5f3cf35c0cb1b9fc4e693509e9880e67/67484734448.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 5276 bytes
SHA-256: f164a87aa005fa043006310f027eed0025d15e02b22786272ab9b25b367d84ef
font_01_sfnt_off0000fa4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4B 10716 bytes
SHA-256: e68b81e899a04e59e44067e85be1ceab8e1574df54a346ce9890d8e37b9b4726
font_02_sfnt_off00011efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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