Malicious PDF — malware analysis report

Static analysis result for SHA-256 754b65ead8c2239e…

MALICIOUS

PDF

63.7 KB Created: 2021-09-03 08:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0495a951d620ce22c711f88167a0e6c0 SHA-1: 5c7b740c8a9cad91223c8aa6831cd82feba180f4 SHA-256: 754b65ead8c2239ef329b3d349cc752f4db9e56e348226536c2597b81710991e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to compromised WordPress sites, likely serving as a link farm to redirect users to malicious destinations. The document body is heavily obfuscated and unreadable, suggesting it's not intended for user interaction but rather to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5541

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=missing+alphabet+letter+worksheets+for+kindergarten PDF link annotation
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16120d77bdf3ee---47112719356.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c2b46989c93449580b8435aa96437395/13786520862.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/8imvk1r60q5k0vd9e4l601k9on/ratigimavisizebalexujo.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ii0lep6qb67tbeiq2g5edus0t7/30558377360.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/88161895875.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2da8e44f0---nadoxuwopevafutozoper.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/setazakevaloduxurefe.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e903231b78---kovejibakusi.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fd5ae2bd9---66871259943.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/zipagejidase.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/tiwomapulibo.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/c148d1279e886e6bab028d82115c1971/74143015859.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/qo565hksaid6fjjtkv4o3so10q/vozelifugokikosutev.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1611f2fbf34458---fuvudofuzofumosodil.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608588a77733d---23248684589.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/70350892686.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d99e8993c---weligizuzemol.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/xezigokagovif.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/sovutekavewoxenus.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/39014490717.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/wuwegikaxi.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/628uuajtlklg0vgpout78da1ie/tadisimixipa.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/18069474930.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/10142630807.pdfIn PDF document text
    • http://mcutech.net/upload/2021/07/file/1625719908531358309.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77D 11088 bytes
SHA-256: e1d404935852497d9caf8b932d6204dcb5356048060bcde2546cb8f5cbc9a816
font_01_sfnt_off0000e0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1