Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee24d131301ad07d…

MALICIOUS

PDF

81.9 KB Created: 2021-03-02 21:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d3e940fcb85613ec81eed470b7309bea SHA-1: 464a6269701ac7f99d2b2af4d8a63c5e51815543 SHA-256: ee24d131301ad07dc0e04bd303d4746f3bf6a143ba32741484821fa8178e023f
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, with the primary one being 'https://nipisod.ru/wix?keyword=opera+apk+file'. The presence of these external URIs suggests the document is designed to redirect users to potentially harmful websites, likely for phishing or to download further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious intent to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://nipisod.ru/wix?keyword=opera+apk+file PDF link annotation
    • https://cdn.sqhk.co/luwagoma/hbhaCjh/94870414149.pdfIn PDF document text
    • http://easterthjg.com/determine_the_indices_for_the_directions_shown_in_the_following_cubic_unit_cellfkita.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/bObDieh/marvel_contest_of_champions_tier_list_august.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_600e618fe8821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386595/normal_60296b0c62aac.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/hhhVXje/90280709659.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/cjhNf53/jebopepimagabem.pdfIn PDF document text
    • https://cdn.sqhk.co/foxezevewa/fhgLqya/13437894752.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/hjlUJgi/49747655031.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/fekaduvopigab/65993593416.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/2053149676.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
    • 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_off0000f291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 4808 bytes
SHA-256: 0a5ab0b050e4d1d7a8ee8f7944d599be2ef1c926c61e39b839cc2a3544212028
font_01_sfnt_off000102fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FE 10080 bytes
SHA-256: 845508350e8fb991737934cb180c65b9e0d2f80457cbede492b865a3ccedabf9
font_02_sfnt_off000125c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C2 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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