Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c69830c8cb0ad07…

MALICIOUS

PDF

76.0 KB Created: 2021-09-05 17:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: afd1119d0916bd7baad66ca7442dfc87 SHA-1: bd6ad3240b760abd27a5965fa36625f72c92821a SHA-256: 9c69830c8cb0ad07f2d55137b67796b31b6bd71c88ee4ddf1c3981f1243d76d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to numerous distinct hosts, many of which are hosted on compromised CMS upload storage or disposable hosting. The primary purpose appears to be directing users to malicious websites through these links, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://uangraja.com/contents//files/89715535229.pdf In PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3a655d9cc---3105140666.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/kukixonejojuwoxa.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/tixewafifofolebitofizalam.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/da90248710e151a6104af9806f8f7ef7/33057290198.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/08/06/fomevebanumaroporugokima.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/44601227572.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161344f9b497c0---wumilozan.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/42335742572.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/99615423490.pdfIn PDF document text
    • http://vo23.ru/upload/file/judosapiretaliluk.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14222b91e1---bujonepo.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbe24ad5dd---81428478199.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/tidamome.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/0286b49015a171436f8f19ab50c57ae2/rawufosi.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/fabekavebogonuwuzed.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/jajivif.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609088965a620---sovikowanuwedurabamuk.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/wedivozirixevinupuronen.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/77859511004.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/d61824c096b93a00fff2c132835dff73/xakutikobodekofesegok.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab78ce014bc---nopedemexupexi.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/3dlp45hb8nmnhf4p8e2frlevb5/gupamozesazuluzunopejo.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/3b3db5de40199ab2e82ddf1cb8dc9cec/29111970844.pdfIn PDF document text
    • https://realschoolspirit.net/scauserfiles/files/kuxijulurizejuzejevam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=nitroso+oxime+tautomerism+pdfPDF 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_off0000c0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D9 18768 bytes
SHA-256: 69493a5658c016826d5a46ff4a34d6ef7b0e944fb56756355d340c9d3b266777
font_01_sfnt_off0000f19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B2 10688 bytes
SHA-256: 69c4212c5ebdb0faea1d18f4eaecb4489a8c5d7f93fe5642a9923cf1643f9e9e