Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e51fda4f77e17bc…

MALICIOUS

PDF

92.3 KB Created: 2021-07-19 12:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69f6184790059126a40781b305b84a4d SHA-1: 7d791c8167b93a36f780655b6fc5237b44088c7a SHA-256: 8e51fda4f77e17bc3c0cf19e0d029f2ad1182b7201125c7189a426b1a07f61c2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document exhibits characteristics of an advance-fee scam, luring the user with promises of a prize or funds and requiring a payment for delivery. The presence of numerous links to compromised WordPress upload directories and disposable hosting further supports its malicious intent. ClamAV detection and ML classification confirm its classification as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f2fd528e5---muxaroru.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d41e982234f---36368830739.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16081d97b9beae---wosaximemowugi.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729804418cf---25843164839.pdf
    • http://shinies.ru/img/lib/file/ponusib.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16077b7cc0e0dc---lapodonudokuzewitaturi.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a943329f588---14641045058.pdf
    • http://zhfangyuan.com/uploadfiles/files/1201786305.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2012a25fb---pajofugesune.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/7fjfru7krkopra4evjhscl13q6/96710184024.pdf
    • http://shinies.ru/img/lib/file/bogibowuwaduzijuxofup.pdf
    • https://p87.hu/files/15608465890.pdf
    • http://prime-standard.com/piceditor/file/1476385835.pdf
    • http://viprealestatebrokers.com/userfiles/files/65066800058.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c724a5b7aa---solinumofawu.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce2f149c3f---45061075562.pdf
    • http://www.buildingmalawi.com/images/uploaded/documents/sajigav.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/0bd094d18d944e0acfd9569d1efaf578/lekemapawedixum.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/210403fed786a64a6cdd7cd907fd6922/15456219704.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/b1e50b4155dbd532b0aaf6785cfd250d/11119139805.pdf
    • https://berbagiangka.com/contents//files/nuvipef.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607620b0f13a4---68593674318.pdf
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/21501332844.pdf
    • http://henca.com/files/details/file/61527575876.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=universal+remote+control+for+all+tv+ac+set+top+box+apk
    • 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_off000104e7.bin
d4a7a62354631d065c0053c5f0afc3995d6b0175d8ed81ca27c729ce5a863e14
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E7 11048 bytes
font_01_sfnt_off00011e71.bin
9ec8f498b93e910d632fdd539e0e8bf68846ea5fbfe9d0c5b60ac5e7ef1b4869
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E71 17208 bytes
font_02_sfnt_off00014b67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B67 16792 bytes