Malicious PDF — malware analysis report

Static analysis result for SHA-256 6630f58801a346d1…

MALICIOUS

PDF

78.5 KB Created: 2021-09-13 05:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 377f34cdef396765d61a8ad5c86d175f SHA-1: c6820f327f44767a6d2168675da13f5634b7cabc SHA-256: 6630f58801a346d1d6f7c7a54538e4897d3ed6e76d59f737fccf36f1b7f5c9ce
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting and act as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded JavaScript is a common technique for initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=champak+marathi+magazine+pdf+free+download PDF link annotation
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/tidopopuruf.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/goditinuvizomugolirumu.pdfIn PDF document text
    • http://caramelitos.sk/files/7372119398.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/zogijoxete.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/dalizag.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/97431624210.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/7652322304.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/11322877776.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/1070462764.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/40784644375.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/losigijozixu.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/supanosavi.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/93737361009.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/29086976479.pdfIn PDF document text
    • http://benetalent.com/upload/files/94662605147.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/janonoroko.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/pujuped.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/25499032332.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/nixagipadidobejetuzot.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/67201216963.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/1120595433.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/jotuxiwix.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/bulibelezug.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_off0000cb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB22 18208 bytes
SHA-256: 14652eaa72c401b784046ea7ccc0be9c28a5f2d0e882e38911470c02f464f04c
font_01_sfnt_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F6 11048 bytes
SHA-256: f8a897026b4ba7a570a4661a91ba8ee97ce1b6c05afb664dd7035aa7c384d211

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