Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e0f11374b1e4e4…

MALICIOUS

PDF

93.7 KB Created: 2021-07-03 09:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13182f9b9dbca7f9f1ddea8d0beda88b SHA-1: 4355eb8724eb2612f6766d4a03bcd6cb9fec22e0 SHA-256: 95e0f11374b1e4e4733faee60f15901fa89b8be462b91295f270555c542720b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS upload storage. The ML classifier and ClamAV also identified it as malicious. The document's purpose appears to be directing users to potentially malicious websites hosted on various domains, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e7af67ba6---65126542205.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160accff79f3d1---zoxan.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0c7544b5e---45183814655.pdf
    • https://mamo-tato.ro/userfiles/file/40559659188.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16077965e896b6---2113790093.pdf
    • https://vivaldiroberto.com/img/files/mediafiles/file/siralin.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160c07cd03fc37---50044320952.pdf
    • https://peptidturkiye.com/ckfinder/userfiles/files/49704034205.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/8590f8a7197929f946bc791ca06ebfde/38118381349.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/5131d8c089a79d4243075dbdd409e22f/20656310570.pdf
    • http://cnhhgj.com/upfiles/userfiles/file/48948061579.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8a6a17e68---96672312242.pdf
    • http://www.vinoplaza.nl/img/upload/files/pererebazurigimibiman.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a936f1218ed---54608238889.pdf
    • http://insidethedigitaltrend.biz/userfiles/file/28357455385.pdf
    • http://dedanskecasinoer.dk/userfiles/file/napodupewodesifasiratiwer.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/576d18cc50dcd45b4787d9127cad3619/55409036389.pdf
    • http://viviapalermo.com/userfiles/files/wevepakojinojevuxisavike.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/5556900878a5abcabe8f42e3898edaa3/20253814428.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94c1c05a4---62431857376.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=endless+harvest+ielts+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010abb.bin
fc3ce7d472bccdc9e588208b9d79be0526a4353b4bd1ac145109cf81f8395350
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABB 10360 bytes
font_01_sfnt_off00012215.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 16792 bytes
font_02_sfnt_off00013a27.bin
fd37596f9735a45c9a4c617b7f7295aa084ed243ae23dadd5ab62079edf48f4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A27 17716 bytes