Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b32a18b1b5c400…

MALICIOUS

PDF

77.2 KB Created: 2021-09-08 00:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c2ce5cc9f6c571f50e2db123f093efe9 SHA-1: 364f5dddbdcb9be6ea4ec2ade00e39c353b920bc SHA-256: c4b32a18b1b5c400afd5556a480d7d544aa0536301752d16a4fd5f6b7ef96ec5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via the linked sites. The embedded JavaScript is likely used to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • 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.
  • 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://irlanc.ru/uplcv?utm_term=hindu+baby+girl+names+with+meaning+pdf+download PDF link annotation
    • https://i-chat.tw/js/ckfinder/userfiles/files/deruteli.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/getarodate.pdfIn PDF document text
    • http://consade.com/userfiles/file/kikijisuzizino.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16094ac7bde4ff---21589246717.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/23760092283.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/bc2e69dedd4a1dcccc5accff74431e2b/kimipanoruxozopilumokusod.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/putudinup.pdfIn PDF document text
    • https://aicsmindia.org/ckfinder/userfiles/files/bepitirur.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/tupawopuw.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080ae1c5490d---37773061953.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/ev16pbl70bjusfev7366i46qv7/52910655799.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3f8bdabd7---4024870045.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/joxovivolobamesapuwovo.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/79387469020.pdfIn PDF document text
    • http://babamoleskine.com/files/file/40790686455.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/fa05777d96a3a2c7fcd109b45b939025/xonamasisitu.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf9fc10ee5---xebugimemovopesu.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210817113112945.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/l4k2atuv7aobq6f1e94u00nl53/kejuru.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/sqvjkdbk502eaqbuovpucrpbqv/lagit.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c73c90aa229---sumitarosefi.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/87921973780.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/34b3aef37aaaff6077cc0386cbaa71f6/85237907036.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/18424571592.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_off0000c661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC661 18016 bytes
SHA-256: adad74f4c034022ec59391783ad7f893dbbfba7ada8cadbca565f729d31e1101
font_01_sfnt_off0000f4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E3 11376 bytes
SHA-256: cbbba636d09a266b9d1569e0db4e3dbc26dd55e798f1f11897decef33b660a6d
font_02_sfnt_off00010f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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