Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0eef667fb231521…

MALICIOUS

PDF

75.3 KB Created: 2020-12-18 21:57:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: bb96ed124e38d2c04c4506f0942bf991 SHA-1: 88683defbbacd13f6d9bebbd62d0014581eaf021 SHA-256: e0eef667fb231521d6245befd57fb5f730fbffaa61649322591daf8a22997024
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to external websites, including a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a malicious intent to redirect users to harmful content. The ClamAV detection further supports the malicious classification.

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://cctraff.ru/strik?utm_term=india+house+houston+president In PDF document text
    • https://tujebikofo.weebly.com/uploads/1/3/4/3/134359874/4d1dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5fa7c7961cc48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc54f925bcb0228a29fbd05/t/5fd75259d654060362e51cfb/1607946843523/71052393445.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0da75085bf90c0efcd65a/t/5fc39a0a3f75b1664342fc4f/1606654475434/president_of_liberty_riders_detroit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06ef3116eb00e3c49974f/t/5fc3b1564f98375720507d57/1606660438102/eastlake_middle_school_ohio.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7d509de11a3bcb749b5f/t/5fdc993b113da4610caca892/1608292668120/brain_tumor_powerpoint_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a2ec486-09dd-424b-8b62-9597535c5745/jejovatazepijif.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57b5ca5bc066edfc4833b/t/5fd6aa38481cfa31add316ca/1607903800650/itunes_app_store_for_mac.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc33ed640f1034a5cb81b15/t/5fd21d8a880fa23343dbe90e/1607605643031/jurassic_world_alive_dinosaurs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d41d346-22de-497f-88b2-6863c88112a6/3297424422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425dd7f1-b5b0-44bd-a924-037537e7474b/campbell_county_schools_calendar_2019-20.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/xilipixodojom.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7a3b0a190b16b315946c/t/5fdc978dc32e197a2e085de8/1608292240714/wubavewiwabifegofira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80caba03-beda-4aba-bd4e-c714f658218f/59673143344.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_off0000e9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B6 4952 bytes
SHA-256: bf3fe45793da80e68d7ff7a075b00f2c1ee783e4354e772216fb2002bc56f5d5
font_01_sfnt_off0000fa85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA85 11128 bytes
SHA-256: 932ea34f6877c2bf092bf8b43af1d7bab1187dad085202a0bfaf38550ac5f69d

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