Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0e95af85cb2a92…

MALICIOUS

PDF

96.9 KB Created: 2021-09-20 02:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4530e02ea6a720a167ada5721a19c6db SHA-1: 6530d9308704c1e827496b7b7f444e74cb5506c8 SHA-256: ea0e95af85cb2a92d3fbc5081e665e0b45edaa112ae51acbd9992daa7b037897
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to websites hosted on compromised CMS platforms or utilize UTM parameters, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://crewmak.ru/uplcv?utm_term=top+adblock+for+android PDF link annotation
    • https://sokolzgierz.pl/web/uploads/files/kalofi.pdfIn PDF document text
    • https://coluer.ir/documents/file/meniremafifafikeganikid.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613f71c4935d5---guxupezizeroxomejusazaf.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/2b791a1f130b4754fe5d7bba89ac643d/zitoladurobuxuzo.pdfIn PDF document text
    • http://intemhathanh.com/img_duhoc/files/jijumitavobegivewitexo.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/88828768528.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/76445685720.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/45782395895.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/22029959668.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8a00da110---55941155467.pdfIn PDF document text
    • http://vicc.huh.hu/UserFiles/File/92227578663.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/xeket.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/wixut.pdfIn PDF document text
    • https://specialgarden.ro/userfiles/file/83864541980.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/dapulelovefikeritisimu.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/zabuxotojikebomojovim.pdfIn PDF document text
    • http://cobmedia.hu/include/pabutiralanudepox.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16145a052476dd---zowele.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/24853679993.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/6c2991981bf1761306e4565f408103d0/mupuba.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613db9f262be6---rarajupipurimidafinoj.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/rojasonezikedodude.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/35716742962.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/sujuluxivibu.pdfIn PDF document text
    • 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_off0001123a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123A 10408 bytes
SHA-256: 5430f7df243fc7907ce2b32ecc7691575615caeaca6e359fc24615a0e1420094
font_01_sfnt_off0001298c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298C 19844 bytes
SHA-256: f39248c295865011c9b6bb537e2005eb12eb226f6723126aaaec7ff6b1d7c2e9
font_02_sfnt_off00015dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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