Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de5e2801c34f3a8…

MALICIOUS

PDF

82.9 KB Created: 2021-09-02 21:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c8a50d9a72eeea85bb9206176dca1f36 SHA-1: 068451e20eb26caee719cbb01cddbea1db4a0467 SHA-256: 5de5e2801c34f3a8a400bafda0ff63c2fbabbd8c7139e50f98bc77d04fa4d7d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading payloads or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ee2e1b35052---ralalumojovefopimixe.pdf In PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/barikuxineja.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/h3mp81oood5fsfrd2n1kf1smjo/noxagunivodivosanuriju.pdfIn PDF document text
    • http://protectakoteasia.com/ckfinder/userfiles/files/nanivakex.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ff41578a---fisujilofegoluzo.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/3353883455.pdfIn PDF document text
    • https://palet-school.com/files/files/mababijowonaroner.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/8283ead72eb5e74656027ab5991139a9/vazokebeburi.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d7ad715a6---22719287379.pdfIn PDF document text
    • https://media-get.com/userfiles/files/56259939145.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1f4698fee---xuwududeg.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/0c1b98169f19244c33a9d316ab7470ab/joruxaselebufifuvojafeg.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/13519672476.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/xovuvemuxiwesewa.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/kodibule.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794489e4ec4---jixibivokudoxuso.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/43727407446.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/uvmlck10thmdpkqfnsvonv8ub3/48395479315.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/c54c5e8b8c847afe83c471a7cfddc33f/24033303513.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/26312054045.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-4-30/20210430231453185407.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701689c9e38---16492884735.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/duwonu.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/17311904208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=leccion+de+escuela+sabatica+2018+pdf+descargarPDF 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_off0000d6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AD 19660 bytes
SHA-256: 1e65e9bcbcffecb59539f01fe5a36cc963963650012e5775410f81e101c8ce78
font_01_sfnt_off000108de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F5 11492 bytes
SHA-256: bc4b4d39d11e0f16d5a2a51e13257c794fee7c53a714c711e36d2bde765141a2