Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2ee0f700876ba4…

MALICIOUS

PDF

81.7 KB Created: 2021-09-02 14:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cfc16e1ffb9eb10ac33cd73d3197558b SHA-1: b47354c08f1c4217a9edb28678d6f0b6a0f7125a SHA-256: 2c2ee0f700876ba47a443a74dd4154fd7f15de3945160f44a848eebd1bd1b992
96 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple compromised websites, directing users to download files. The ML classifier strongly indicated maliciousness, and the presence of numerous links on disposable or compromised hosting supports a phishing or malware distribution attempt. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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://synthecinter.com/userfiles/files/50309009877.pdf In PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608de9e326a97---51702378420.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/161154604ab34e---960238639.pdfIn PDF document text
    • http://aprt1day.ru/file/85861717218.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/99678355321.pdfIn PDF document text
    • http://www.pvvc.cz/files/retunasof.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/4843f0e3ed8f8d363ed0dcc4e6ccf8fe/8707169479.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/98103433423.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160fbbe45dcad1---weduxekapuma.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1612be70087345---86479076536.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/ditewibezalafuronerifip.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/xudukalumidexorasiv.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/3901552693.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fda79d5bab---70423048421.pdfIn PDF document text
    • https://taxiporec.top/wp-content/plugins/super-forms/uploads/php/files/8t4loqiirbam3gpul84pfodl50/timexeloralorejuxanavuk.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/2b8863e8207489f8146243c81ec7e906/10886412670.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/80973385913.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/pujituveluj.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/b7be3531506a4260527261382c493d50/midagepefofageroba.pdfIn PDF document text
    • http://mav-auto.ru/images/file/newiwudewixisax.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827aac7b3a2---bumadevofawumoginapokig.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/vikibovanivefekilox.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/tumefovunukajomokeveg.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/jisevuvizejegevuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=omzetten+pdf+naar+word+online+gratisPDF link annotation
    • 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_off0000db28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB28 11012 bytes
SHA-256: db30ebeaa0a50c8109fff9187889616d4c8b1d60bab87af832471fd3fa45ab37
font_01_sfnt_off0000f4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB6 17360 bytes
SHA-256: 74468c5f508c85cd9428e1c6e7c1ff804f3b7b5a4a48005c7054aa2358a881d8

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