Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffdf1e9fdc00002a…

MALICIOUS

PDF

74.8 KB Created: 2021-02-26 13:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9daa9f213140096cd433621a82eb2d92 SHA-1: 87eaaa11e7e7ebd2fa1725020cb661e5a387474f SHA-256: ffdf1e9fdc00002a86cebde6f777bca1f1ff9cb905eb36bdbfcf0a05b443150a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/strik?utm_term=how+to+make+a+textual+analysis'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the overall assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=how+to+make+a+textual+analysis In PDF document text
    • http://kadufepofawimer.iblogger.org/what_kind_of_oil_does_my_honda_odyssey_use.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/wikidivovirure.pdfIn PDF document text
    • http://tekabufoj.22web.org/html5_thumbnail.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/readings_for_sociology_8th_edition.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/41417814143.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vufupu/50554278678.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/46177666179.pdfIn PDF document text
    • http://durunorutap.epizy.com/47940208782.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/mazejagopepijopo.pdfIn PDF document text
    • http://zesositug.epizy.com/valkyrie_anatomia_reroll_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/sijobusimewabovejura.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/gamesuredugojasusonoro.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/bang_bang_english_song_pagalworld.pdfIn PDF document text
    • http://fegifujeviba.epizy.com/microsoft_office_powerpoint_templates_2010_free.pdfIn PDF document text
    • http://sarowagilujet.rf.gd/dusodubo.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/56237667858.pdfIn PDF document text
    • http://riporem.epizy.com/besomumoxi.pdfIn PDF document text
    • http://medevigad.epizy.com/62559606995.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA21 5024 bytes
SHA-256: 12154ea21bdffe875ea47bd6c3ef27ec2aff563cc0a5f3ca9535fcaf49bffb68
font_01_sfnt_off0000fb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3D 10228 bytes
SHA-256: 2193451332706d772946cd0bbc56042c62f22d1221d577d3f8487fc5d392f858

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