Malicious PDF — malware analysis report

Static analysis result for SHA-256 338f13ac7bd8dc99…

MALICIOUS

PDF

142.6 KB Created: 2021-06-29 21:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 35a71e460a592b72f0cdb7c5750ed18e SHA-1: fcba3fdc607618cc344dcb5cb6c8b697c00ea3d3 SHA-256: 338f13ac7bd8dc99c8681d81d31fd8862b62a5ec9eae90ad420171eca795854c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The presence of a link farm pointing to compromised WordPress sites suggests an attempt to host or distribute further malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16072ebfbebfd7---favapogejixetitega.pdf In PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/43848707658.pdfIn PDF document text
    • https://fuoriscena.eu/file/towidenodomofoxiluvifugim.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/a475aaa5fdf66eb4465d78edf0aa26e5/97535179756.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/55961584718.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/gulazipomaminak.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1001635943---98934989923.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a90f8d9b621---tomogixufix.pdfIn PDF document text
    • https://telenovella-bg.com/files/44622219452.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/26265268874.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/a283100c48de499e8cfcf5635846e052/68921852732.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083699d2f143---lumizipebevadazebelaru.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/34130313271.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/7cd6374145742f59ab9118d40e22e468/7813191054.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/9922f4790ddf37a828ece8829f961f3e/61281685442.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/fogoxijibona.pdfIn PDF document text
    • https://castel.ro/userfiles/file/497212258.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/84977306101.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2691994430---fizowafupo.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a855c4a1ae9---wikuruvokidisikepu.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fff4ba7320---17777034406.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/a103545737dd5650f0ea84a99c2cdfa8/xanubukevu.pdfIn PDF document text
    • http://faradbox.pl/files/file/29737925737.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=changing+all+the+words+in+a+paraphrased+textPDF 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_off0001ca34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA34 10892 bytes
SHA-256: 8dc3efe451c735ba8be34cb4ebd58a43eb1d5ed4e75733abf4d34919d3492d4b
font_01_sfnt_off0001e335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E335 17956 bytes
SHA-256: 2d6713e35563cc438d1bfe59bda9abb7a9fb90abc1eeefc1b7fec805cdc17af4
font_02_sfnt_off00021274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21274 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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