Malicious PDF — malware analysis report

Static analysis result for SHA-256 280193286ae3a160…

MALICIOUS

PDF

86.0 KB Created: 2021-07-16 23:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7479d933c3d68e3f27b0854ab766f823 SHA-1: 3f90020afcabb945434113615cd3a988c51ed2c5 SHA-256: 280193286ae3a160b10fbc1bb8b819393f8739d4556b90f306294fc424c1bb05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains malicious content. The heuristics reveal it functions as a link farm, directing users to various external URLs, some hosted on compromised CMS platforms. While no scripts were explicitly extracted, the nature of link farms in PDFs often involves JavaScript to facilitate redirection or exploit vulnerabilities, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://curry-box-deluxe.de/userfiles/file/50352979050.pdf In PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/t4sam6psdhja83qommpcgspout/tonezefutelogef.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088039bcf32b---35139317178.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/4c743e875b37725028a899b4c1da6a3d/15738467446.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/xijutarofen.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f52c349f6---wivolutobisexexidovasoge.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/murixasonimazafubolewuti.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811fb56207c---mawonenajunetunawopew.pdfIn PDF document text
    • http://megalaserasia.com/upload///falozi.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/tufexunutusebelufiwiwaxu.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a149bfb7396---20354595254.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/da13d0f20a32e9dd89dbca00e55f1105/12409046098.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608025745ed1d---35528091683.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdce920209---siritijefawoduned.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/rorijovanoge.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/da7d2ed4d8c9642e1f36a6b93b0f0e67/29637634705.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/gubiz.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/gazafasez.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/0i5qc6s704uqobbv18sl7d3udr/85012492466.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/regopajajine.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/68455713022.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3dbcd7da53---64699347452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=best+attack+helicopter+gta+onlinePDF link annotation
    • 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_off0000ebd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD3 10796 bytes
SHA-256: b9412abf1f30f7efc4f5861196b779a2a19ee4cd278b3eea2b4d3915f0dc98c2
font_01_sfnt_off000104b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B8 17540 bytes
SHA-256: 4a62e45eb88480dc8272509d3a3cd4222193b390858e4c2f791d92a0efa7a3b5
font_02_sfnt_off00013283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13283 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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