Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce9b7c72fe8ac99…

MALICIOUS

PDF

131.0 KB Created: 2021-08-12 13:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 6d03ed4a80f2b350662282db6e074c65 SHA-1: a6a83c2212c8b1ce05d4afbe0d69046868f78ec7 SHA-256: 5ce9b7c72fe8ac990996ab16b52e9cdfcaa2894d9e99e82c61ff26b2284c41b5
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a high number of external links, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests the document's purpose is to trick the user into installing malicious software by masquerading as a necessary update or plugin. The embedded JavaScript likely facilitates the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://irlanc.ru/uplcv?utm_term=cfa+level+2+schweser+notes+pdf+2019 PDF link annotation
    • http://sunnysolutions.it/uploads/assets/file/75503588616.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/60113650164.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7564b5278c---27828473523.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/novok.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/safanusulapamu.pdfIn PDF document text
    • http://sclifeguards.com/clients/16854/File/savarogaze.pdfIn PDF document text
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/98136683028.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/b9088042317ae32d83919fd6ce8929a0/64638610998.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/mozewojedujax.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/d2dd220e390ffd9c76a8b24de38157a1/14280337355.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/71099889400.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/44784404110.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/48585001347.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/c75b4e051f3d7216399d01899286f1ea/zulibizozavesubibakekobe.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/i40s2le1gsagq8nf6adqlm9qil/fugugepirekos.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/15508092166.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/8mihh6q89090g8l8p29nrlk056/9807787270.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/8547836513.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b42d68efd---vijago.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc27da41cf---giwuwuzuwu.pdfIn PDF document text
    • http://sdds.be/userfiles/file/38940027860.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000181dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181DC 18256 bytes
SHA-256: 4c8a24119bab7124aa50773e9bdf8d134029ddf8464967c166a6a8faa0620a01
font_01_sfnt_off0001b1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1F6 16672 bytes
SHA-256: 39705e255d89e5c329ad06669e116fdfcba6596d1adc774b7618cc5277beace8
font_02_sfnt_off0001c97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C97B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001e192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E192 11272 bytes
SHA-256: 4174fbebd9cf72b1a9eb109dbf0f5faf2888e1ea43facdb372403b30801606e5

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