Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eaecaf1d18c181b…

MALICIOUS

PDF

83.2 KB Created: 2021-09-10 04:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6eac8a0a46e825d314a56af6045637ed SHA-1: 996d1b6700401cd42d222ee08870784a859f1498 SHA-256: 2eaecaf1d18c181b0dd367b28161f5556db0b654d541a697df19bf181edea0ba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users. The heuristic firings indicate the PDF acts as a link farm, pointing to numerous external URLs, many of which are hosted on compromised websites or disposable domains. This suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/xegare.pdf In PDF document text
    • https://alhasooncorp.com/Files/files/78187543861.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/fakewam.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/mufedifubefisiwijekor.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1c116eb0e---zigugufabukabexe.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/xofimu.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/161308322961a3---wofanoxaman.pdfIn PDF document text
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/29948233540.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/ffc191cd095b5b84a69f1e3d2aaf8fa4/nunifulasizomup.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/63247109525.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/kugonamuworu.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/sovezidosenot.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/sogerefifuxoratini.pdfIn PDF document text
    • https://tigaintan.com/contents/files/lutipebesuviw.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/95608991241.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/26943487150.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/texofegijapixadigipejogo.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c694ab1d95499769e7fccde530481e55/wupob.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/60124818003.pdfIn PDF document text
    • http://kasargod.net/uploads/file/tazewabiro.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/64914036453.pdfIn PDF document text
    • http://live-net.it/file/ditofekakosizenutirudore.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=latest+english+movies+torrentPDF 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_off0000dfad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAD 18332 bytes
SHA-256: 39d55b0c1fb032b5e29f5f60d0e13168ee85106aedf1d936f51138a5bda1af5d
font_01_sfnt_off00010f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0C 10580 bytes
SHA-256: c0f610ca2b503039a663ccfcdd01a92d7afd4c55e1db6deecd9798d6fdb47418
font_02_sfnt_off00012700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12700 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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