Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee24fcc7a131bd2…

MALICIOUS

PDF

72.1 KB Created: 2021-06-28 03:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8a28445cd1c581dea09cfe6acc490c2 SHA-1: 305bc042ad23a0a01ba597609b7d7180a2866600 SHA-256: 6ee24fcc7a131bd2308fa2fa4a5c26055d7d2aa1cfe12aa941ffa7e1cb4aadfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns, likely initiated via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://oniceh.ru/uplcv?utm_term=wheel+of+prophecy
    • http://zeguvietnam.com/uploads/ckfinder/files/852852932.pdf
    • http://hugslock.com/app/webroot/img/files/6961910273.pdf
    • http://driver-jazda.pl/upload/file/xexurugomevasixi.pdf
    • https://beauti-full.ru/uploads/files/75326392940.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8707370045---12230175370.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2ea06f702---23006532788.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/028af9f0726d85bfd1cd8651ebde7a7c/napedojikoje.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/4bfd15b31333ac4a5f7a763a5cddaa5e/wopibixafojo.pdf
    • http://diplomat2014.ru/ckfinder/userfiles/files/68135492143.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16095fb3936468---20143186419.pdf
    • http://musorcentrum.hu/files/article/file/garatolepiwuwudomas.pdf
    • https://forumhrdbekasi.com/webroot/userfiles/files/bozaxivuwun.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608327813c3f1---4759838362.pdf
    • http://statsale.com/data/upload/ck/files/1143480341.pdf
    • https://vandolderskb.com/images/usr/gajijija.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/igk2e5kugvq32amtl8aj4itv2j/5700808985.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986f99c3068---28295136367.pdf
    • http://tragiaocolamsapa.com/userfiles/image/file/89959863423.pdf
    • http://wittlich-luexem.de/userfiles/file/31162993047.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/cfe17dcbecaab78b350e908e4244872d/34574651804.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/03008a19aaad50f6ffd13c537c8e4a98/marazesujenoguxigi.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cefaa73df1---45285527661.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acab3d66f55---74587705415.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/v7fti8723q8ijm5ddf9jai3uig/67313122118.pdf
    • http://autohondl.cz/userfiles/file/zereb.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57f6f5f2c2---sunejubajixemanaxisu.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/vm8vvnml72em0sj1p7qgt1rv6b/debalimo.pdf
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/delarasitefiju.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcdf.bin
ced678e4f57b1b713c202416cb3262e167a4231d87758a2db0e7b93497ccb36a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDF 15512 bytes
font_01_sfnt_off0000e48d.bin
be27fe9abcb19ec0286501fec510b7b63594f56251ec01663fec1bace0dc36ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 10060 bytes
font_02_sfnt_off0000fb16.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB16 16792 bytes