Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fb9e712473ded5…

MALICIOUS

PDF

83.1 KB Created: 2021-10-10 08:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e6b30b9d5ba425bdfbf87526a0267496 SHA-1: 706fa90b5a8d815cefef21f7a7f77e0a5f78aacf SHA-256: 48fb9e712473ded5c59451ec7d1fd940c56bfd30639794ebde84e196857e54e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is used as a lure, likely for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=pcos+and+iui+success+stories PDF link annotation
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16137e44907200---57111695196.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/gusojazot.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/71175509971.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/1c0e60c49f2d53856f4b6f28460827a0/35652273248.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/10188421713.pdfIn PDF document text
    • https://a-metal.e-giant.net/archive/file/files/59499729924.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/b64559034e7b3dd0b1661d81b3142623/lubalule.pdfIn PDF document text
    • https://garnet-medical.com/userfiles/files/visalojit.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1615803abd9ade---75921062505.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/81954082785.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/71836277164.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/52813003524.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/xujitefuvusarozix.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/liliwegunowa.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/jakokuwewovezikojago.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/26887498824.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/13976283866.pdfIn PDF document text
    • https://nwdglobal.com/ckfinder/userfiles/files/supemiranezerojusozaf.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/zivepedojefotinad.pdfIn PDF document text
    • http://thegioioto.store/upload/files/juret.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/05/file/47918712644.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/26209474833.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1615610738ce37---45127574295.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/59403281201.pdfIn PDF document text
    • https://bawauang.com/contents/files/xamarifefururebiwuzu.pdfIn PDF document text
    • http://i-physiology.ru/upload/loxumerajezowedunasodam.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_off0000decd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECD 18684 bytes
SHA-256: 26ebed83be04aa3e34bb541911a9e35d1ec68fb777e6b779dbf64775b3b07cda
font_01_sfnt_off00010eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C6 10420 bytes
SHA-256: 45018c3005549cd31520b0ea7863aa8c9c9a773fb46d5f35d8dfdcb5cc40c057

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