Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec4087af6534f5b…

MALICIOUS

PDF

82.0 KB Created: 2021-09-04 16:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 455e5b285cbf598cd9f31960342aca2c SHA-1: 3b6b548bd27f0979850a65f28172c9607a015733 SHA-256: fec4087af6534f5bfae2cbe11ccffce14d7b8326dcf0185074baa1dc7e1dd54c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting. The primary purpose appears to be directing users to a link farm designed for phishing or malware distribution. The embedded JavaScript likely facilitates the redirection or obfuscates the malicious links. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://drafthe.ru/uplcv?utm_term=inteligencias+multiples+pdf+descargar PDF link annotation
    • http://studiobaldizzone.com/userfiles/files/87025231262.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/t35fjvnjlrvd7ddmb01t7l8f97/32952880932.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e679a8735e4---46609699959.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/actc6lmr503aud0s8lsi2ct080/733057525.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/lanowekerogupidibabexazu.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/33123244846.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/7ba3a0a78c0b4618995c9085e416c6cf/jevuxijovozuxuxer.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beee5e0749b---31743230873.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/4828419124.pdfIn PDF document text
    • http://www.afurg.com.br/assets/ckfinder/userfiles/files/66027405382.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/42694435582.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/24266546234.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/e339d4d1c98ce6870d10edf9da08d70f/mikakopomazadusidilanuku.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/69624801527.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/34824769029.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4942f02d46---47950555050.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/nizozazulonumi.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851fdc637fd---74285753626.pdfIn PDF document text
    • https://sintasyapi.com/img/userfiles/file/kojepotomimije.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/418h86qobltvatocsj0pqlu9mb/25883371394.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/92489831082.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/2c73c9253e22c68d9544f9fd1788ab97/92031150497.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/44313651329.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/75589603902.pdfIn PDF document text
    • http://alliance-vietnam.com/upload/files/woxebore.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/runixabizuben.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D8 19728 bytes
SHA-256: 6a9787762e53ff2905d9594a409457b4fe0ff6cea6b668dcdc78844d5fb8e548
font_01_sfnt_off0001099a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B1 10896 bytes
SHA-256: 98f0e06a2d5c74740c7e4f9db1d94b42ba09dd3019a5eca984f31a81e236577d

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