Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd7a08f633071b1…

MALICIOUS

PDF

73.8 KB Created: 2021-09-15 13:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b94727ef2cb0401e02f9c694303f0ac4 SHA-1: 6986d56b041fc9bf5a02dedc08212455e40a04bf SHA-256: 7dd7a08f633071b11089cfe868f004b7d29640a112dbe4732afe9e57e0276bd0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://synerhu.ru/uplcv?utm_term=the+pirate+bay+torrent+proxy PDF link annotation
    • http://anm-av.de/uploads/files/zozibonivaxirafuxeb.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/45632112167.pdfIn PDF document text
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/51221254069.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/85283239146.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210905215510144.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/j3hv5sujfp050kt7r7fd6tkq3k/jogufi.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/xukozulil.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/50983295178.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16136e33d14628---84536166002.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/dulukipavuvuzewar.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/13572987268.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/dodabixujimikug.pdfIn PDF document text
    • http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/100024531532.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/tozonexifuwopafasor.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/nuwejowudi.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/95140639053.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/51478427798.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/17866471956141a731cd7bd.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/pikiteropubijefepuni.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de47bc14b9---tijoj.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/53735856280.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16133b78a780b4---xudaso.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/14748749458.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/nafizakevovoxel.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/niwidufa.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_off0000c235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC235 10452 bytes
SHA-256: d03531ca67fd2e99e763320a01aa010c5e930251c82a18bca82bab0232423575
font_01_sfnt_off0000d9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B0 15984 bytes
SHA-256: ef90a02242965085679dcfeb691c55a282fd2d7af8dec94b482e0caf912b3438
font_02_sfnt_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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