Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fbe8b11821fdab…

MALICIOUS

PDF

79.6 KB Created: 2021-09-09 09:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 398211e439eba2465cf0290059481def SHA-1: 5e2a952e37b86e0453cfe71a63b9258bad02013e SHA-256: e0fbe8b11821fdab3c154a8949bc9ad7c620d6ef7b08b53af9485b8fba418d55
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. The presence of an MFA lure heuristic indicates the document is designed to trick users into providing sensitive information, likely through a link. Several unknown reputation URLs were extracted, suggesting potential download or redirection points for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://currenwatch.myhost360.cn/file/upload/files/09-01-07-57-53-20.pdf In PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/xawujemenetiwiwe.pdfIn PDF document text
    • http://sinching.com/uploadpic/files/202109071535552192.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/nawesotovebituwupu.pdfIn PDF document text
    • http://altus.pl/userfiles/file/34403088773.pdfIn PDF document text
    • https://oasis-travel.ro/files/19568290395.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cd7541c3679ae442a78fcfa28578a891/23204310520.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/pesivovisutew.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/38140435995.pdfIn PDF document text
    • http://cx-gl.hu/images/files/jipajefinomokisububavare.pdfIn PDF document text
    • http://bakoca.hu/files/file/56489234686.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/nutefepe.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138799c4a2b7---27694568102.pdfIn PDF document text
    • http://anm-av.de/uploads/files/nogonadevopodavujonabu.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/81851103730.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/lizom.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///lakevotewiwa.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2723168920.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/bexivopabawumanovages.pdfIn PDF document text
    • https://nakshistudio.com/ckfinder/userfiles/files/gawidekulemimililevutal.pdfIn PDF document text
    • http://maydemtienvn.com/upload/files/62264231125.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+share+data+from+android+to+laptopPDF link annotation
    • https://www.thc.gda.pl/ckfinder/userfiles/files/piwirivaza.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_off0000d3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CB 16952 bytes
SHA-256: 2a299dd2810ae0be1625d89e628b9f44011c625b58f96197326af6a18cf735d0
font_01_sfnt_off0001000f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000F 10840 bytes
SHA-256: 87074b1ee18e64043b473ce5a72828d0ae38829ad6ca9c8e21c5193c6d97c4a0
font_02_sfnt_off000118e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1