Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bfad9facd73c59…

MALICIOUS

PDF

86.1 KB Created: 2021-09-12 17:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9602caafa7cf3272b88b84719ebbb4fc SHA-1: 049c98bd8be3fb26fc10b7d7f447caa05cb509e4 SHA-256: d5bfad9facd73c594fc5308491a81328b6c104f1d52ac5656d8309077bff7214
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to phishing or malware-hosting pages. The PDF's structure and the presence of multiple external links are consistent with a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/30719130803.pdf In PDF document text
    • https://mahae.hu/files/files/jakobiwafixoxi.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/99c59f563ef0ed5809ff0738a7461d38/dikoremet.pdfIn PDF document text
    • https://tsegypt.com/file/nerakivog.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161329941a22bd---lodidanegifid.pdfIn PDF document text
    • https://isagrinio.gr/userfiles/47649965284.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc4364aa5b---nagut.pdfIn PDF document text
    • http://donghotam.com/luutru/files/runomiduzinovuzefapis.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/zujoraxixesifobeb.pdfIn PDF document text
    • http://proxima-online.it/public/file/laxaval.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/koraxajezudanumuvizijo.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613deb4062417---34997480620.pdfIn PDF document text
    • http://snsi.jp/image/news_file/wigebukevamoniguk.pdfIn PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/xunawadokusisidu.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/40999827851.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/62043411574.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec7ea554d4---batexevejomo.pdfIn PDF document text
    • https://angkalaris.com/contents/files/78652638181.pdfIn PDF document text
    • http://xn--spreewaldpension-lbben-9lc.de/meineBilderAlbertGrundschule/file/20479982483.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/sudodibelilevutabewenar.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/sanitififemiji.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/fubirajabamosoweb.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd36ceb969---gabazuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=online+movies+2021PDF 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_off0000e9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BF 19224 bytes
SHA-256: 966c52ddcadc8a69c1ec10fba0aaa04a53337543c0cec62f5f7a18a8493ea266
font_01_sfnt_off00011c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001345b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345B 10296 bytes
SHA-256: 394ecc8131a8017055bd5e0e40c39eb6b66adeee2797d9538f8b12183a05b8de

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