Malicious PDF — malware analysis report

Static analysis result for SHA-256 80addee9aee4a9eb…

MALICIOUS

PDF

110.5 KB Created: 2021-08-28 22:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea3b68dba25c8991ce1357b3c070c3cf SHA-1: cdadd648dd475aad5a0979c978fcf3bb1d890361 SHA-256: 80addee9aee4a9eb53ec2c3eb7e3b12ac44ac87381a49dc0ebd180e81342bbae
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a phishing or malware distribution lure. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=george+robinson+ray+charles+brother
    • http://al-bandak.com/userfiles/file/67909529342.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/0tutrerfervhssqme942kl6vsp/jofetidel.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/8a59b9b413ba48ef3be693a98568255b/91433520537.pdf
    • http://elcampoeco.org/FCKeditor/file/fejegaxujovusowepidawif.pdf
    • https://sitpchemcieszyn.pl/_sitpchem/file/76174183546.pdf
    • http://grandwatergatehotel.com/upfile_hotel/files/70734967946.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/be28975b533f131d3bf99b847a7de968/71164919822.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/30d74c21e99724f2910856947e9451de/84994030634.pdf
    • http://angel-juicer.com/FileData/ckfinder/files/20210721_8EF1592D1A8A3D08.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/1c2229c52a5c2c9feabf0f266afdc7f9/deverebab.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de67920884a---zuxop.pdf
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/94041519594.pdf
    • http://splhardware.com/UploadFile/file/2021080208470973499.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jq0cp47m9bkivrvu0t9ka1h9o0/rulefunixejuw.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/cddf0e89a614f393f7e9774a7108e219/jaraxuvige.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b30eb3f3e---25011680241.pdf
    • http://vagtteam.com/userfiles/Files/kejeresupirad.pdf
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/71433476176.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/7be4ck5qb76kpl8ildrb7ad22n/78916164663.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/accd6b34098e0836f1afec9edad9acf9/401010197.pdf
    • https://lexconsulting.ro/webroot/files/media/rupizazaweruxa.pdf
    • http://jump360.co/upload/files/20210730125947.pdf
    • http://luberoff.com/userfiles/file/33732133689.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc50c747827---wosemeginuzutemulojiw.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c884702ca7---dubopivaferoxobimi.pdf
    • http://asvpp.fr/pdf/zofokaj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014966.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14966 16792 bytes
font_01_sfnt_off0001617d.bin
84b44f5f91ec932738f6e2b28fe031afc47a65dbc6bbac511764af076464772c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1617D 10800 bytes
font_02_sfnt_off00017a5b.bin
67f9f822102b460983618f1055a2881f62e391f315cbe8c4b452c2550d0f3283
pdf-font-stream PDF embedded font (sfnt) at offset 0x17A5B 18980 bytes