Malicious PDF — malware analysis report

Static analysis result for SHA-256 4016274056f73cbd…

MALICIOUS

PDF

80.2 KB Created: 2021-10-11 23:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c9098bf9adf9ebbeb5033b35ac2d0415 SHA-1: 7aaaa7b4794d4553bf1f440342d17a2841c9c110 SHA-256: 4016274056f73cbd3313214769a20dd5114cad80ae195da3c820c9b08beecc71
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites and other domains, suggesting an attempt to distribute malicious content or phish for information. The presence of external URIs and link farms indicates a likely intent to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/22ec6076feec3d6a85f039e5f0e9e94c/sulusepat.pdf In PDF document text
    • https://dzido.pl/userfiles/file/93663283591.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/14287610119.pdfIn PDF document text
    • http://tfforming.ru/d/files/pobigokevasazux.pdfIn PDF document text
    • http://vegman-kzn.com/ckfinder/userfiles/files/gamubigatijifulusikufubi.pdfIn PDF document text
    • https://cvssteelex.com/ckfinder/userfiles/files/91534313621.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a36549331d---87398087803.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/razusipilifazebovakex.pdfIn PDF document text
    • http://grimastone.ru/files/figadujinikibok.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/67139223935.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/64504535356.pdfIn PDF document text
    • https://jewfri.kr/files/image/files/37870731303.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/44736870915.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/74556988713.pdfIn PDF document text
    • http://retailcop.ca/files/86647775875.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1615394a292595---wifeguxidu.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d79ea1f60f---mezemijinapefagufanel.pdfIn PDF document text
    • https://pmms-online.com/assets/file/noliledimanowibegadera.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1614f3a3036d97---volomofuzudejugokova.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/xoxurigakizukoxe.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/26599909319.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/xiwidarojebagaxulenabopor.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/abc52610349d6bb9da51588fb283c3e3/gomalat.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/HTGXzuRVGb4/uplcv?utm_term=how+to+remove+password+in+windows+7+administratorPDF 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_off0000d183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD183 18684 bytes
SHA-256: 134f623b0e861a2c27016e0d0e255cba8313efe3dbf6440c0afbcda335d868e9
font_01_sfnt_off00010276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10276 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8D 10700 bytes
SHA-256: 4de910a2b4544f425b7c426c3e5f725da6f36f9f8b7f40a9f19faa9bc12819ff

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