Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe25ae44ef62e6f…

MALICIOUS

PDF

95.1 KB Created: 2021-06-13 05:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 85f92426d72e6b0a53f6836c04903861 SHA-1: b89fa50a10c7094ab6b8b878c3c3602f33b48b9d SHA-256: 6fe25ae44ef62e6f1e26cc97bfc875c1c3a08df2833000c4d63eba47a741c140
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document is classified as malicious, exhibiting characteristics of a phishing or malware distribution lure. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document prompts the user to install a browser extension or update, a common social-engineering technique. Multiple URLs point to compromised WordPress sites and disposable hosting, suggesting an attempt to host malicious content or redirect users. The ClamAV detection further confirms its malicious nature, identifying it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://philabc.ru/uplcv?utm_term=hook+up+printer+to+chromebook PDF link annotation
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160890549e38b4---zujatasinunid.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4594c0ab---1248691924.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/59129365282.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be7d2e96689---92581632603.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/muguzitovodemowekotuxek.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/birogipamakoxulenodo.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/c209e15f595a36984e97aece1b5f94c8/54480336475.pdfIn PDF document text
    • https://securitydm.com/slicice/file/8912058044.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/63249175235.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/67925228508.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/e074b0328ada2165718d777f9c800c0b/45965274510.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/malujerunaputazebivitene.pdfIn PDF document text
    • http://artospace.com/pics/file/jejigisefuxubolaze.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/1361933d6a9915ab99e48335f31553b5/fupuje.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/sewefozatavixonoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13908 4916 bytes
SHA-256: f1d1bc0a0da454f3670a9c3197c971387888cf313e49033dbbd5560b2f232baa
font_01_sfnt_off00014994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14994 11124 bytes
SHA-256: f80ee620e01c1c3752e68d180945c36179b4faa415e12fe5a42907342e68bfc1

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