Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64be68911da3946…

MALICIOUS

PDF

76.3 KB Created: 2021-01-03 03:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6c502add8ebe590f399c8cb7078946be SHA-1: 75eb98dbc03673ba999108b6e7e289825c262809 SHA-256: e64be68911da3946f56a68aef2328985db4c66250cdb38ba1e12690420053c02
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the heuristic firings suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/aws?utm_term=fast+and+furious+8+imdb+parents+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407983/normal_5fbf39ac591fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496404/normal_5fe8d72e3eda9.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/niwekox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450519/normal_5fe38d95210ba.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvomafoda/dGiajcI/raxapabefavizolixigiwe.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/7251b04a72eb98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483864/normal_5faa4c6738a6d.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/pafiganovavi/mugunokeginopaxalopaguf.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/exponential_functions_word_problems_worksheet_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/friends_full_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/66710693661.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/vudurotekagow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ebc8328-d7e1-4839-8e98-b93e6fadce18/mr_president_game_no_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f2a3ee9-7506-46f1-86bf-aef1959cf2ff/recover_yahoo_emails_deleted_from_trash.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_off0000eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 5620 bytes
SHA-256: dc860f57b6393d8915cf3fac486d47c605697ebbfecb9e7c0d9a334cd22595e5
font_01_sfnt_off0000fe5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5C 10776 bytes
SHA-256: 7bf7ccdd2052e61e49fd3f26eb1c3b90f9b2ecf1ea660ac930732f5f4eaf13e2

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