Malicious PDF — malware analysis report

Static analysis result for SHA-256 6100645dc87afed4…

MALICIOUS

PDF

84.5 KB Created: 2021-09-20 02:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 07db5da23e019742e7a8958abfafce65 SHA-1: afa9eb642eb9c8be99657f5cab8726f076183a56 SHA-256: 6100645dc87afed41afed4e054ed9c280d61c44d407d3a5219c948ac83c61222
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to link farms. The ML classifier strongly indicated maliciousness. The presence of embedded JavaScript suggests an attempt to execute code, likely to redirect the user or download further payloads. The document's structure and numerous links indicate a probable SEO manipulation or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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 https://swapnauraan.com/ckfinder/userfiles/files/34487931373.pdf In PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/33925922276.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/27486280191.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/89081691601.pdfIn PDF document text
    • https://termoformat.md/img/files/liwaredabarugivip.pdfIn PDF document text
    • http://kdbelektrotechniek.nl/uploads/file/papigusurobutodun.pdfIn PDF document text
    • http://abworder.com/uploads/files/vivewer.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/47620009738.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/tazedug.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/66352265452.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/pufesirutew.pdfIn PDF document text
    • http://placc.info/up_image/72654773079.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/d9e2cbe7b83aa995f111adb847fbb062/82815198947.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/pexaketixafawuxid.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210913153844.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161407ce1489a4---gemuduwabefezodi.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/kixipemojufuwodokapazev.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/29659166792.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/161378a49d39bc---93152636149.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/3523769221.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/mitifexapugapexizop.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/42824746745.pdfIn PDF document text
    • http://slxiang.com/v15/Upload/file/2021911043454113.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/51652800536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=pvz+2+apk+downloadPDF 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_off0000dfb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CA 10220 bytes
SHA-256: 151990bc2493dc8912ff6883f538e2bc7367431dcbffdcb01ddd1cf8c1df2f03
font_02_sfnt_off00010eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 20756 bytes
SHA-256: e2fdf483425dd850fa1370d4a75e923abebfc2df3458819c63e8edf53477a4a8

Open this report in the interactive analyzer, or submit your own file for analysis.