Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a875c072566d12a…

MALICIOUS

PDF

96.2 KB Created: 2021-07-20 05:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dbfc55406b0ec3f86c7c77932408bf13 SHA-1: 110f702d3ddfd01b49ebdcb94f75da0d8e2e8260 SHA-256: 5a875c072566d12ab296a1bffe5786b942e120c25a4b867b909d6326c3d86d54
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly suggests the document's content is intended to trick users into paying fees for a non-existent prize or parcel. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 https://fairtradeportal.pl/userfiles/file/vosuruvamalunivonevotawiz.pdf
    • http://circuitoinsulargc.com/documentos/file/niputojonurup.pdf
    • http://erpos.sk/data/files/matipukatuparej.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/1bb65617f1094629d74558c1f33ba674/6754153222.pdf
    • http://massarentearchitettura.com/userfiles/files/10186118026.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/deh2cvfvarmutbkv8tci89nnc6/55956160567.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0750da2cf4---jonomuwavutodenowofawuku.pdf
    • http://zuche0551.com/upload/file/somixuwujoxabitunasil.pdf
    • http://sansboundaries.com/clients/f/fd/fde0d4b6b324343791c5f0705b221951/File/29608152377.pdf
    • http://hurtmar.pl/Upload/file/xotujujobulose.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a864cb950---lakedojugemujowubav.pdf
    • https://mbzl-pro.xyz/web/img/podborky/files/45959618843.pdf
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/kumoterudogop.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/586e0f7647339c326ddaaba5fbf375f4/xixofevonopegekumun.pdf
    • http://fastgood4cheap.com/clients/4890/File/53068851278.pdf
    • http://aarogyamedico.com/userfiles/file/fomaramemiv.pdf
    • http://hanhthien.net/uploads/file/busudukakojuza.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/6638b6f7e6a191830d06abf86dbec651/7589750232.pdf
    • https://iwnta.com/userfiles/file/dagotumoguwexikex.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607be91062cc9---suturugoxeg.pdf
    • http://henrysadiereunions.com/clients/876463/File/3112119458.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/9300afbd1b95444b1b8910cdcb0d4224/50982815856.pdf
    • https://cleaner.pl/userfiles/file/16857803066.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/cd50fa81f9e48f8be5b1e9c82682b398/45145192725.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=best+drawing+for+competition
    • 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_off000111a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111A8 16792 bytes
font_01_sfnt_off000129ba.bin
50df9e64b3ecf770c8959a1d4ae159646d8c2063ce3fba1c22f396e957476d60
pdf-font-stream PDF embedded font (sfnt) at offset 0x129BA 18384 bytes
font_02_sfnt_off000159fa.bin
52023acb5e32c55e0a8d7601653ac4135f8a3b0707cd1a9d0ec669e5b1ba58ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x159FA 11056 bytes