Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9299c8d7a7ef69…

MALICIOUS

PDF

87.1 KB Created: 2021-08-04 03:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c6fc6fb843771625c679b3338dde31a8 SHA-1: 5fc3308f596014aea4ed80f282d4ca1df941dc9a SHA-256: 2d9299c8d7a7ef69376ed4a85fb44c60f39282fcd8def549a203640f69424a12
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering to lead users to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://annandale1963.com/clients/69704/File/5322823313.pdf In PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845bc5c1ec0---rojefowolamil.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e53e594800---26196784434.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/57912976601.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a442ced0e66---54745759264.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/19498084339.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/303468ed22e46163796ad403e63036c9/13677485847.pdfIn PDF document text
    • http://nappsa.org/userfiles/file/xiwinotetamovufozip.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774d069bb97---51248690938.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/b921b95c4b516e18b5429ef11420e434/nijuweka.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/fa4aa0a0cd9abedd0dbdf6b385a26935/jujigutofidiw.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/kudizolinijezuma.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/fupobemuzotebaz.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f2e7156f4---nadisaxororonisapagobux.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/636644a8805827fbe34d82e2f4f7567d/90712931357.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/13533314548.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210801040321111.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/zirabelez.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbdc8c3325---3366710445.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/894rcgm1ofefajvf10amvqhpp0/jodevobixibupa.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/zenodevebesiseju.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893ffa52582---53081277286.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=alight+motion+pro+apk+3.2+0+indir+son+s%C3%BCr%C3%BCmPDF 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_off0000e848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE848 19480 bytes
SHA-256: c78bafa868cd98026bd1cc21c391de028ece3146db70d25dc6dcd9960679847a
font_01_sfnt_off00011971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11971 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13188 11452 bytes
SHA-256: 13aa97c4edf7bc03fbc173f13e85874d23f22cec205ede1c6b71fbad24f634b4

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