Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce15b9b07b6ed8d…

MALICIOUS

PDF

82.1 KB Created: 2021-09-19 18:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a18590db1b905a71db83f8836b7ac408 SHA-1: 32d02bf83af6c020972900591598cd621bda8f8e SHA-256: fce15b9b07b6ed8ded0871c6b413cd5682b3bd77c01f4bba2b6dc9b7316f4bb0
186 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 phishing or trojan threat. The heuristic 'SE_SECRET_RECOVERY_LURE' strongly suggests the document's purpose is to trick users into providing sensitive recovery information. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://angelsforwarriors.org/userfiles/files/71111261394.pdf In PDF document text
    • https://samuelben-horin.com/userfiles/file/roxujunabuwo.pdfIn PDF document text
    • http://profstil.az/userfiles/file/tadevupeloxuti.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/29667158836.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/pomorasefoter.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/46120323287.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/mogulala.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/9e0f7621a6de6bef5b686c7810f5eb57/jaganagunojeponiz.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/95601926699.pdfIn PDF document text
    • https://terracell.pt/images/file/firerikurixodajoreb.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/tamorutolosinewem.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/38673578758.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/88875598941.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/83045078426.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/37179263744.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/41407414783.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/losuwifepuxusikimofoj.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/94909420263.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/fowugaledonarezitaveteto.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/90256118860.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/f7f3c92c1ab60908e512af373d931c38/fenabalewujuwek.pdfIn PDF document text
    • http://pneusmarene.it/images/file/batogokunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=android+tv+on+raspberry+pi+3+model+bPDF 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_off0000d628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD628 11024 bytes
SHA-256: cce531b7f05dd60c4a0c50805576387b4d38c2d25785a5ec58df01fb65e13af4
font_01_sfnt_off0000ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 18952 bytes
SHA-256: 0494987b95200c908bf9eea36ae0558ef2463c8bfa0b21b253dcc38c9616b718
font_02_sfnt_off00012152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12152 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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