Malicious PDF — malware analysis report

Static analysis result for SHA-256 e204a6680e0f7339…

MALICIOUS

PDF

88.6 KB Created: 2021-07-05 15:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0ecb9d15e11699a3f1400e0094440a84 SHA-1: 57e8d898447bc490b2663a63dce470b8692a1d72 SHA-256: e204a6680e0f7339321fabbd886cb90a41c1d11694c2c8b5c597726d4e8ede98
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains embedded JavaScript and is part of a link farm hosted on compromised WordPress sites. The links redirect to other PDF files, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • 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://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8aff84a59---20868936734.pdf In PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/71693015527.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a2b9eb998c2428c3580d90e365f933ee/95077221659.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/14f3a82d83bd27e3eb84f82892bd9827/zonumiroxazafutiravesowi.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160be56db4ea7f---38422229016.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d0120487744---10278377046.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f1c9afd56663b645abd2106fb66aebdf/32791997365.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/saretipuniguwobunivulun.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/vufejelekoruduxos.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/36c894d2529be49600c7a621b426aa6d/xulebirusigewilesu.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160700ca6cdd70---nexogizixamiganavakejute.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/womodevaxozelavosazagot.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/45251edf3f405e5d872a2185696683b4/guguzax.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/lktv0a05egu2lcmao4qbjmqj0f/sokijezufelar.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/v9sfpp6dstnqi8lfulv9ns3p90/95429271733.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/90801258445.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b641ad363d4---totelo.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cae841b0125---66534802288.pdfIn PDF document text
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/55779887123.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c3eef19c3---35233536197.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/mupozofokilusamuronolaju.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acaaf5f0e20---lotitax.pdfIn PDF document text
    • http://wjcopy.com/upload/files/tipibagesonubuw.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/1981bc810175d5051d9b340be7677a1c/vutosizigojazovir.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e42dc74c40---sijitogel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=games+ps2+androidPDF 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_off0000f9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C5 16952 bytes
SHA-256: c8dc6fa144d75783706d1f355018121bf058bfe5888770a172bb85d0c2e8ac6b
font_01_sfnt_off00012544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12544 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5B 10568 bytes
SHA-256: f211c68616b92ecd63dc8e39bd6f0ee2b00d7daa83ad915996a41c481f81fb1f

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