Malicious PDF — malware analysis report

Static analysis result for SHA-256 231a9b1fc25becc4…

MALICIOUS

PDF

74.0 KB Created: 2021-09-20 02:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d111e6c1fac869a7e33de642e846e7de SHA-1: 24b2fc06c6600d798a89b76bbab122f9ba5f2c83 SHA-256: 231a9b1fc25becc495a7d9699547db1e6e81bc4c52e7207e8304bf292bd32916
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to 'coc hack ios download'. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure as a link farm suggests it is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://pixomot.ru/uplcv?utm_term=coc+hack+ios+download PDF link annotation
    • http://thepokeluau.com/uploads/files/89979533330.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/komazazulimobupikurami.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/19/file/dafakirok.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/29595817830.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134237408b23---zodejususofekojudofirow.pdfIn PDF document text
    • https://shinko-tw.com/UserFiles/file/6802520669.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/setusemimubepireli.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/13243312964.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/4551161264.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/tikulifamiwomadawukigufu.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/7696335151.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/derogaw.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/fudukitil.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/detasagikivolenex.pdfIn PDF document text
    • http://nieruchomosciklodzko.pl/files/file/derupuliwojotadeb.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/zewubufupomiloku.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/rupowareji.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/28639184643.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/11606630719.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/takiji.pdfIn PDF document text
    • http://rigdrilling.org/userfiles/file/xulazowoledubeten.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/68182587099.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/24773372462.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/35542488002.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_off0000c00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00B 10348 bytes
SHA-256: 010c13d18d920556dd5d656076fa0cde82b808b417e083936d7733ed975e39ac
font_01_sfnt_off0000d75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75B 16780 bytes
SHA-256: a5fca88639a29ac6386e208237d5a69e84661d97ab8671414d7cf2915ff6483e
font_02_sfnt_off0001025d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1