Malicious PDF — malware analysis report

Static analysis result for SHA-256 7212460b582618e0…

MALICIOUS

PDF

96.0 KB Created: 2021-08-09 01:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c0d4d2bbefc393ffdc055e10e048edf SHA-1: ce9052123c593bb8f8da97159f6891a000725c23 SHA-256: 7212460b582618e010b5f56b15d19c7a79f500880a87f9ba0374886e9752115b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6590

Heuristics 5

  • 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
  • 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://krisoc.ru/uplcv?utm_term=periodic+table+of+elements+list+pdf+download
    • http://nzmbc1611.com/clients/e/e6/e6eb4f38db7021b04b945082fca6026d/File/sobatazuvidivogafoduxoxof.pdf
    • https://semangkabiji.com/contents//files/mivojetadikuko.pdf
    • http://kenshopvn.com/uploads/files/56859797658.pdf
    • https://smartstone.ca/userfiles/files/47200717340.pdf
    • http://mnwebdesign.dk/userfiles/file/92992080024.pdf
    • http://adacu.org/userfiles/file/20210807141108.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/8tjqchdmsl9jdomoc2qpkusocj/joxomapabizezimul.pdf
    • https://jpjplumbingandheating.com/FCKeditor/file/55407287800.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c89e6804f0---sodemulizevukudiw.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/fq5re22k088ol4cd91b5ujn0i3/xegudadukotawixetem.pdf
    • http://smeclassof1987reunion.com/clients/37165/File/lenizobogezejaweribimajiz.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/ad7b0f92c944d3316d5d15343931b3cd/36556112024.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d83c31316e---xumubezigazap.pdf
    • http://trunghungplastic.com/luutru/files/nukudulezekidurogo.pdf
    • http://gintaras.cz/userfiles/file/64893672087.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718677bb1da---50052441122.pdf
    • http://agrion.org/upload/fichier/vapawidudupe.pdf
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/4ddf719eb67c9d5c8960fef6fb3eeb82/84047620688.pdf
    • http://ikkosushi.com/uploads/files/20333437622.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f33ec69e0---86471494967.pdf
    • https://surupaceanu.ro/ckfinder/userfiles/files/59827529096.pdf
    • http://pushgroup.lv/userfiles/files/60416406722.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D10 16792 bytes
font_01_sfnt_off00012527.bin
9016ff25d17eb7988c13baf1f100409082930f05b280b70a88c33fdb009831aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12527 11008 bytes
font_02_sfnt_off00013e89.bin
f2666e95f4599b990980a0abf2f374fe3006e34437484733904d739abeeb93bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E89 16228 bytes
font_03_sfnt_off00015469.bin
7b5f8e1394ff1d781d55e62ace7ed808d031277cab96e4aa982f6c7c89553237		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15469 17696 bytes

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