Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0da2eea3df44b8e…

MALICIOUS

PDF

97.8 KB Created: 2021-09-18 18:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dc56f73106b2c292f59cdbdd2abb8511 SHA-1: 51632f39d29840d9c58d02ad7bb1f74515ef44b4 SHA-256: d0da2eea3df44b8ebfbbc40b371fdcd48aa96d76ecad53168ee32446aff6134e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.anaja-inter.org/public/file/9994995411.pdf In PDF document text
    • https://henuopack.com/d/files/4765569867.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/dudapuzejumep.pdfIn PDF document text
    • http://trieuduong.com/images/Download/41523968004.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/tolejelimuxova.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/61790845070.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/96411191491.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/merawexawalatexus.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/66518556873.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/37275484934.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/bagexoxejedipodumukudilav.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/2e9a0ddb1fdeb8b654c61aa186f70681/45967090300.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/ludekobenavo.pdfIn PDF document text
    • https://possamaiferramenta.it/uploads/file/33482113161.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/82868166114.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/37671373807.pdfIn PDF document text
    • http://ed-union05.ru/files/file/11019687250.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210914160104.pdfIn PDF document text
    • http://kaies.net/upfiles/2109112308148272002hbx4g.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/musaxefafow.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/jaxem.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/kamotaneleripadijumuwu.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/nopigajo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=harry+potter+and+the+sorcerer%27s+stone+full+movie+putlockerPDF 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_off00011370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11370 19504 bytes
SHA-256: 992e7eb451b43f36e27732ece6eedafa0d84dd750973233095e418659db49af8
font_01_sfnt_off00014669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14669 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E80 11280 bytes
SHA-256: 3fed7bfa47d28ae0e454f7a4a0e2d9c41afaade3b4afd87981df573e7e5309e2